段落大意题 知识点题库

    Paying a higher price than usual for a ticket to see a film in 3D is the annoyance of many a cinema-goer's life.

    But there may be a benefit to doing so, as a study has found that 3D films exercise the brain and improve short-term functioning in a similar way to brain-training tests.

    The research found that people who watched a movie in 3D improved cognitive (认知) skills, compared to those who watched it in 2D.

    The research was led by neuroscientist(神经学家) Dr Patrick Fagan from Goldsmiths University in London. More than 100 people took part in the experiment, where participants watched Disney film Big Hero 6 in either standard format or RealD 3D.

    They also carried out a brain-training-style test before and after seeing a section from the film. The test covered memory, reaction times and cognitive function and the results were compared later.

    According to the research, which was carried out in partnership with science group Thrill Laboratory, participants experienced a 23 percent increase in cognitive processing, as well as an 11 percent increase in reaction times.

     Fagan said that the results showed enough of an improvement in brain function to suggest that 3D could play a part in improving brain power in the future.

    “These findings are more significant than you might think,” he said. “It is a fact that people are living longer and there is a noticeable decline in cognitive brain function in old age which can worsen future quality of life. There has never been a better time to look at ways to improve brain function. The initial results of this study show that 3D films may potentially play a role in slowing this decline.”

    A second part of the experiment involved those watching the film being fitted with headsets that scanned brain activity and this too showed heightened (加强的) activity when watching 3D. According to the results, participants were seven percent more engaged with what they were watching, adding to argument that 3D movies are more like watching real-life—something Professor Brendan Walker from Thrill Laboratory agreed with.

    “As Professor Brendan Walker's test concluded, 3D films are more attractive and heighten the senses — this, in turn, makes the brain run at quicker speeds,” Dr Fagan said.

    Many children first learn the value of money by receiving an allowance. The purpose is to let children learn from experience at an age when financial mistakes are not very costly.

    The amount of money that parents give to their children to spend as they wish differs from family to family. Timing is another consideration. Some children get a weekly allowance. Others get a monthly allowance.

    In any case, parents should make clear what, if anything, the child is expected to pay for with the money.

    At first, young children may spend all of their allowance soon after they receive it. If they do this, they will learn the hard way that spending must be done within a budget. Parents are usually advised not to offer more money until the next allowance. The object is to show young people that a budget demands choices between spending and saving. Older children may be responsible enough to save money for larger costs, like clothing or electronics.

    Allowances give children a chance to experience the things they can do with money. They can share it in the form of gifts or giving to a good cause. They can spend it by buying things they want. Or they can save and maybe even invest (投资) it.

    Saving helps children understand that costly goals require sacrifice: you have to cut costs and plan for the future. Requiring children to save part of their allowance can also open the door to future saving and investing. Many banks offer services to help children and teenagers learn about personal finance. A savings account is an excellent way to learn about the power of compound interest (利息). That may not seem like a lot. But over time it adds up.

根据短文内容，选择最佳答案，并将选定答案的字母标号填在题前括号内。

    A research has shown that nearly 90 percent of traffic accidents are caused by human errors. So our aim is a fully autonomous car that gets rid of the cause of most accidents: the driver. Researcher Hodgson points out, “For safety, the faster you can remove humans, the better, even if there are unfortunately a few accidents from new causes. It s a question of balancing the number injured or killed by autonomous vehicles with the people whose lives are potentially saved.”

It's an idea that Elon Musk, chief executive of electric car company Tesla Motors, has long believed. His company are determined to be the first to deliver a fully autonomous vehicle to consumers. Last year, Musk announced that Tesla's 2017 goal was “to do an example drive of full autonomy all the way from LA to New York…and have the car park itself.”

    However, even Tesla admits that there are problems to overcome—the software needs further validation and the appropriate regulatory approval needs to be in place. Indeed, recent crashes of Tesla vehicles and Google cars confirm that the software isn’t ready yet.

The UK government appears committed to encouraging the development of autonomous vehicles. It's supporting four city trials, publishing the Modem Transport Bill to reduce red tape around their introduction and adapting the legal system to take into account problems such as insurance liability when a human isn’t in control of a vehicle.

    The insurance industry is similarly eager to help increase autonomy in cars. As the Association of British Insurers (ABI) points out, “More than 90 per cent of road accidents are caused by human error.” This costs motor insurers a shocking £20m per day in claims.

Dear friends,

    The recent success of children's books has made the general public aware that there's a huge market out there.

    And there's a growing need for new writers trained to create the $3 billion worth of children's books bought each year… plus stories and articles needed by over 650 publishers of magazines for children and teenagers. Who are these needed writers? They're ordinary people like you and me.

    But am I good enough?

    I was once where you might be now. My thoughts of writing had been pushed down by self-doubt, and I didn't know where to turn for help.

    Then, I accepted a free offer from the Institute to test my writing ability, and it turned out to be the inspiration I needed.

    The promise that paid off

    The Institute made the same promise to me that they will make to you, if you show basic writing ability: you will complete at least one manuscript (手稿) suitable to hand in to a publisher by the time you finish our course.

    I really didn't expect any publication(出版) before I finished the course, but that happened. I sold three stories. And I soon discovered that was not unusual at the Institute. Since graduation, I have written 34 nationally published children's books and over 300 stories and articles.

    Free test and brochure

    We offer a free ability test and will send you a copy of our brochure describing our recognized home-study courses on the basis of one-on-one training.

    Realize your writing dream today. There's nothing sadder than a dream delayed until it disappears forever.

    Sincerely,

    Kristi Hill

    Institute of Children's Literature

    Louise Blanchard Bethune showed early promise in math. But Louise did not go to school. Instead, her father taught her at home until she was 11 years old. She also discovered a skill for planning houses. It developed into a lifelong interest in architecture and a place in history as the first professional female architect in the United States.

    After graduating from high school in 1874, Louise traveled and studied. She hoped to prepare herself to attend the new architecture school at Cornell University. But then Buffalo's leading architectural firm of Richard A. Waite and F.W. Caulkins offered her a job. She knew that architects gained their training from practical experience, not from school. She took the job.

Louise worked there as an assistant, 10 hours a day for five years. She learned —-and mastered—-drawing and architectural design. She also met her husband, Robert A. Bethune. Their new firm, R.A. and LBethune, opened in October 1881.

    Bethune appeared to be the strength of the business. At the turn of the 20th century, the city of Buffalo was rapidly expanding to meet the demands of growing industry. The firm received tasks to build hundreds of structures throughout western New York. The firm designed lots of schools, apartment buildings, department stores, churches and factories.

    Bethune believed that being an architect meant being an artist, a scientist and a business person. She made a point of advocating for women in the profession. She became a member of the Western Association of Architects(WAA) in 1885. In 1888, she was the first woman to join the American Institute of Architects(AIA). Besides, Bethune took a firm stand on equal treatment for women architects. She insisted on equal pay for equal work.

    Bethune left almost no papers or letters, and few people recognize her name today. But her legacy remains in the foothold she established for women in the field of architecture. She started her own firm and enjoyed a successful career.

    The introduction of the iPad, with its touch screen technology, has allowed even very young children to take advantage of a computer. So what if all children in a school were given an iPad to use in class and take home with them?

    Anne Laure Bazin works in a school where every child, teacher and teaching assistant is given a free iPad to use in and out of lessons. For her, the main advantage of everyone having an iPad had been the improvement in communication. Documents can be emailed straight over to workmates during a meeting. Children submit their homework by email, or through the school's learning environment. Teachers now take the register (点名) using their iPad, which means that there is a record of which children are in school, and which classroom they are in.

    The use of iPad has encouraged greater sharing of resources among teacher. All communication with parents is now done by email. Working as a group in class is much easier as children can share documents. The whole class can look at one child's work by attaching (连接) the iPad to the whiteboard. If a child has forgotten the textbook, the teacher can take a photograph of the relevant (相关的) page and send it to the student in class.

    While the use of the iPad in schools has revolutionized (变革) the way children are taught, it hasn't completely replaced more traditional methods of teaching. Worksheets are still used in class as some children prefer the contact with paper. The children all have a textbook and exercise books. In Anne Laure's school, parents feared that the iPads would replace exercise books and children would lose handwriting skills. Anne Laure says, "The teacher are not ready to let go of the traditional style of teaching. We have welcomed the iPads in so much as they help communication and widen the resources available but we are not ready to let go of paper yet. The children themselves still value their exercise books and depend on them for review."

    Throughout much of human history, man has been the measure of many, if not all, things. Lengths were divided up into feet and smaller units from the human hand. Other measures were equally characteristic. Mediterranean traders for centuries used the weight of grains of wheat to define (定义) their units of mass. The Romans used libra, forerunner of the pound, by referring to the weight of a carob (角豆树) seed.

    The sizes of similarly named units could also differ. The king's foot, used in France for nearly

    1,000 years after its introduction by Charlemagne in around 790 AD, was, at 32.5cm,around a centimeter shorter than the Belgic foot, used in England until 1300.Greek,Egyptian and Babylonian versions of water in a fixed container varied from one another by a few kilos, Nor was there agreement on such things within countries. In France, where there was no unified (统一的) measurement system at the national level, the situation was particularly terrible. The lieue (former measure of distance), for example, varied from just over 3 km in the north to nearly 6 km in the south.

    Although John Wilkins, an Englishman, first put forward a decimal system (十进制) of measurement in 1668,it was the French who in 1799 made it law. The Système International d'Unités (SI, or the metric system, as it is better known) developed from it and became the official measurement in all countries except Myanmar, Liberia and the United States. Now the International Bureau of Weights and Measures in Paris is set to give the metric system its biggest shake-up yet.

    At a meeting in Versailles, France, on November 16th,2018,the world's measurement bodies are almost certain to approve a decision that will mean four out of the seven base SI units, including the kilogram, will follow the other three, including the metre, in being redefined in terms of the values of physical constants (物理常数).Each of the chosen constants has been measured incredibly precisely, which would mean that from May 20^th 2019 the constants will themselves be fixed at their current values for ever. Any laboratory in the world will then be able to measure, for example, the mass of an object as precisely as the accuracy of their equipment will allow.

    Earlier this month, two rock climbers achieved what many thought impossible: They climbed up the 3,000-foot-high Dawn Wall in Yosemite National Park without specialized equipment. Climbing without this equipment is called "free-climbing." Until now, no one had free-climbed to the top of the rock face, which is a part of the mountain EI Capitan.

    EI Capitan, which means "the captain" or "the chief" in Spanish, has always presented a challenge to climbers. But the Dawn Wall, on the mountain^'s southeast face, is a particularly difficult route to the summit (顶峰). It is a rock formation that is both steep and relatively smooth. This makes free-climbing the rock face seem almost impossible.

    About seven years ago, professional climber Tommy Caldwell spotted a possible route up the wall. It took years of planning and preparation, but this month, Caldwell, 36, and his friend Kevin Jorgeson, 30, finally make the climb.

    Free climbers do use ropes and other basic safety equipment to catch them if they fall — and Caldwell and Jorgeson fell often. Before starting their climb, they broke down their route into 32 sections. Each section was based on a rope length called a "pitch." The rope was secured into the rock face to catch the climbers if they fell.

    Caldwell and Jorgeson's goal was to climb the Dawn Wall without returning to the ground. If they fell, they had to start that pitch all over again. The two men started climbing on December 27. They slept in hanging tents, and a team of friends brought them food each day.

    The men had spent years rehearsing (排练) the movements it would take to get through each pitch. They made it through the first half of the climb relatively easily. But halfway up, Jorgeson ran into trouble. In one difficult spot, he fell each time he attempted to climb. After 10 days of trying, Jorgeson finally made it to the next pitch.

    Getting through that troublesome pitch gave both climbers renewed energy. They finished the rest of the climb five days later, on January 14.

    According to the Oxford English Dictionary, the term "couch potato" first appeared in print in a December, 1979 edition of the Los Angeles Times. Since then, it has become a familiar term for a person who spends a lot of time sitting, and little time exercising. Although there does not seem to be any particular reason why the term "couch potato" is used rather than "couch tomato", a person may become a "couch potato" because living this way is said to make you round like a potato. The term is also said to have something to do with the high-calorie (卡路里) food like potato chips.

    People now would say "couch potato" whenever they talk about overweight and obesity (肥胖). Indeed, "couch potatoes" are believed to have heart disease risks, which can be avoided by regular exercise.

    It is true that technology and modern life in general make us sick, fat, lazy and physically/mentally soft. The more time people spend using technology, particularly televisions and computers, the less time they will spend being physically active.

    "Couch potato" kids are a particular concern. Media reports repeatedly claim that children today are fatter than their elder generations, but less athletically skilled, less interested in physical activities and more addicted (上瘾的) to "junk food" and technology such as televisions and computers. The message is clear: today's children are fat because they are lazy and eat too much. Moreover, because technology is becoming more sophisticated (复杂的), children are less able to resist (抵抗，忍得住) technology's attraction, and are more likely to spend more time using technology, less time doing physical activities and, therefore, more likely to be fat.

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"She's awfully cute." That's what Marty Ginsburg thought when he met his fellow Cornell student Ruth Bader in 1950. Soon he noticed something else." He thought she was awfully smart," says their son James Ginsburg." Mom said Dad was the only boy who dated her," James says," who cared that she had a brain."

That brain, of course, would take her all the way to the Supreme Court. But while the world knows about Ruth Bader Ginsburg-the second woman to be appointed as U. S. Supreme Court justice-the story of the grand love affair between Ruth and Marty hasn't been publicly told until now.

As Ruth became an expert in gender-discrimination law, she and Marty were a living example of what equality of the sexes was all about." I did the cooking, and she did the thinking," Marty often joked. But, as Ruth saw it," Without him, I would not have gained a seat on the Supreme Court."

The tests to the couple's love came early and often. When they were still in law school, Marty got cancer. While he underwent radiation, Ruth organized his friends to take class notes." He'd get up around midnight and then eat whatever food I had cooked for him," Ruth said. Marty survived.

After Ruth was appointed to the U. S. Court of Appeals in 1980, Marty followed her to D. C." He was always trying to get her to leave the office and come home for dinner," says NPR legal correspondent Nina Totenberg. And when she got the nomination as a Justice, Marty took her shopping to pick out suits for her confirmation hearings. He also joined the court's" spouses club" , because he wanted to cook when they all got together.

Their love took on a new meaning in 2010, after a tumor was found in Marty and Ruth became his caretaker again, staying up with him through the night. In his final days Marty left his wife a note:" You are the only person I have loved in my life and I have admired you since the day we first met at Cornell 56 years ago." He died 10 days later.  The next day Ruth returned to work on the bench. Asked why, she had a simple answer: " Marty would have wanted it that way."

Workers are returning to their careers, or starting new ones after age 65.

More than ever, work is where many of us get our sense of purpose. That doesn't end at age 65. After being retired for only three months, Sue Ellen King returned to work at the University of Florida Health in Jacksonville, Florida, where she had been a care nurse and nursing educator for 38 years. She is now working part-time in a position created just for her. "It's perfect," she told The New York Times. "I get the satisfaction of having people appreciate what I do." With the average lifespan for those who reach age 64 now getting all the way to 84 years old, those who reach retirement age still have many potential years of work to go.

Job sites connected toward part-timers, temporary positions, and some can also turn up opportunities that may lead to longer-term work. Fred Dodd tried a part-time job after his unemployment as a clerk for large banks at age 63. He'd thought about retiring then. "But part of me just wanted to keep working partly for the money, but more just because I felt I wanted to do more in my career, " he said.

The retired have the advantage of not needing to focus on the earnings potential of whatever jobs they take on, so these older workers are attracted to more meaningful work. And since they are voluntarily putting their skills and experience to good use, they may well have more flexibility than mid-career people. Two-thirds of retirees who'd come back to the work world were doing meaningful work they enjoyed. Legal work and community service were popular choices, as was teaching—all areas in which older workers might have an opportunity to make their own schedules.

Earning more money rarely seems like a bad idea, but it can cause issues for retirees, including effects when they claim Social Security (申请社会保障) benefits early.

It's normal to long for the taste of potato chips or a cheese –covered pizza. Even though they're full of calories, eating them occasionally won't do much harm. However, according to the new numbers, young people are becoming more gluttonous. The BBC's Good Food Nation Survey showed that on average, 16 to 20-year-olds ate fast food at least twice a day in the UK. So what's behind this fast food binge (狂热).

WebMD, an online publisher of news and information of human health and well-being, surveyed nearly 600 teenagers and adults in the United States. They found that the most common reason was our busy lifestyle. More than 92.3 percent of respondents said they were too busy to cook. Many find it challenging to balance work and life, and the convenience of fast food meets their needs. Fast food is readily available in corner stores and vending machines (自动售货机).

Remember those instant noodle cups from the supermarket? They're ready in minutes, and you can store them at home for a long time.

But many people think this trend does no good. Sarah Toule, head of health information at World Cancer Research Fund, told the BBC: "It's frightening that people, especially younger generations, are eating so much fast food loaded with fat, sugar and salt, but offers little nutritional value."

She added, "Especially high in calories, fast food leads to unhealthy weight gain – which in turn increase the risk of 11 cancers later in life.

So what is the right thing to do? Toule suggested that young people should prepare meals in advance and learn to include the different food groups in their diets.

Brothers Ayaan and Mickey Naqvi, who live in Shelton, Connecticut, were decorating their family Christmas tree last year when one of their favorite ornaments (装饰品) was destroyed. While the ornament was beyond repair, from its broken pieces sprang a bright idea: What if there was a better way to hang ornaments so they'd be truly secure? From that, the Ornament Anchor (装饰锚) was born.

Using a special system, Ayaan created the model and presented it for a school project. The reception (反响) was overwhelmingly favorable-so favorable in fact, the boys quickly turned their invention into a potential money-making product.

This wasn't the boys' first commercial invention: A previous invention landed the pair and their family on a TV programme Shark Tank. While they didn't cut a deal, it was a true learning experience.

From $1, 000 in sales in six hours at a local Christmas trade show, the Ornament Anchor went on to be displayed on Good Morning America. In one year, the brothers' invention has brought in more than $250, 000.

After their success, Ayaan and Mickey are determined to pay their good fortune forward by contributing 10% of their profits to local animal shelters. "Ever since I was super young, I've had a fascination with all of life's creatures, " Ayaan explained. "My goal is to help as many animals in need as I can. "

The boys admit that starting a new business in 2020 had its challenges. While they are enjoying their success, adjusting to distance learning due to the coronavirus lockdown isn't easy.

Through the difficult times, they say they've just tried to take things one step at a time and keep a positive attitude because that-along with the love and support of their family-are what keeps them anchored (稳定).

A teenager needs to have a sense of independence in their life to feel secure(安全的). To some teenagers independence means a lot to them, and I think that some parents don't allow their teenagers enough independence.

Independence has something to do with freedom. Some kids are not allowed to go anywhere alone, and the only thing their schedule includes is going to school, coming home, going to sleep, and repeating the process the next day. Parents tend to be afraid that their kids can get hurt if they go outside into the world. But if parents control their kids too much, they may never learn to live on their own. The best way for a teenager to learn lesson is through experience. I think it is beneficial for teenagers to have freedom.

Teenagers' lack of freedom can also stop them from having good friendship at school. Some might say that this is a good thing, because it helps them focus more on their school work. I argue that this can only discourage them not to do their school work. .Some parents do not allow their children to be around their friends outside the school, thinking that this will get them into trouble. But I don't think so. Instead, isn't this a good reason for parents to get their children a cell phone? Cell phones allow teenagers to stay in touch with their parents, and communicate better with their friends.

Privacy is another issue between parents and their teenagers. Teenagers tend to enjoy relaxation by themselves in their own room. This also gives them a sense of independence. It often annoys teenagers when their parents enter their room when they are not home. I know that my mom always goes in my room when I'm not home, and this has brought me to the point where I have asked many times to get a lock on my door.

Electrical devices(仪器)could soon use power made by human energy. Scientists say they have developed an experimental device that produces electricity from the physical movement of a person walking , British scientist Max Donelan and other scientists in Canada and the United States developed the device.

The device connects to a person's knee. As the person walks , the device captures energy each time the person slows down. To do this , the device helps with the slowing down movement of the leg, the movements of the walking person push parts of a small machine that produces electricity. Using the device, an adult walking quickly could produce thirteen watts of electricity in just a minute. Donelan says walking at that speed could produce enough power to operate a laptop computer for six minutes.

There are several possible uses for the device. Developers say it could help people who work in areas without electricity to operate small computers. The device could also be used in hospitals to operate heart pacemakers(起博器), it could even be used to assist in the movement of robotic arms and legs.

The experimental version of the device weighs about one and a half kilograms, but it is too costly for most people to buy, but the researchers hope to make a lighter, less costly version. An improved version should be ready in one year.

The developers hope the device will one day help developing countries; nearly twenty five percent of people around the world live without electric power.

A similar product was invented in 2005 by Larry Rome of the University of Pennsylvania, He created a bag carried on a person's back that also produces power from walking. The knee device does not produce as much electricity as the bag, but the bag requires the walker to carry a load of twenty to thirty kilograms.

In the 2022 Beijing Olympics process, hand-kitting (手工编织的) Chinese knot, a symbol of unity and happiness in Chinese context, is loved by friends from other countries. It has a complex graceful curve, but it can be reduced to the simple two-dimensional line. It displays fantasy and wisdom of the ancient Chinese civilization. It has elegant appeal which comes from the basic tools of human life in the beginning years.

Preparation of Chinese knot, roughly divided into three categories: the basic knot, varying knot and combinatorial knot. Its knitting techniques, in addition to all the basic techniques, agree with a common principle of knitting and can be summarized as the basic techniques and combinations techniques. But the basic techniques use a single line, double line or lines to knitting, or change the use of the parallel thread (线) to separate thread so as to make colorful knot or bow section; and a combination of techniques use the extend of head and extended ear flap (耳帽), and combine various knot flexibly, complete pack of ever-changing knot ornaments (装饰).

To design a set of beautiful decorative knot, the most important thing is to determine what the knot will be used for. Accordingly, determine its size and shape, taking into account of the appropriate use of color matching and accessories. The shape, color and ornaments should suit each other. Do attach your own artistic beauty and deep emotion to it, which will be able to fully demonstrate the beauty of Chinese traditional art.

Long cultural heritage makes the Han ethnic Chinese knot techniques unique, purely cultural essence, rich in cultural heritage. Chinese knot not only has shape and color beauty, but also gain its name because of its meaning, such as endless knot, caisson knot (藻井结) and double the money knot, reflecting the ancient Chinese cultural beliefs and strong religious meanings. It represents the pursuit of truth, goodness and beauty of good intentions.

Star Wars fans would be familiar with the good relationship between humans and droids (机器人) in the movies. In the movie Solo: A Star Wars Story, LandoCalrissian risked his life to rescue his co-pilot, a female droid L3-37. In real life, a humanoid robot, Sophia, has recently been granted (给予) citizenship in Saudi Arabia. Increasingly, people are ready to see robots as resembling humans. Given this phenomenon, I believe it is necessary to consider giving robots certain rights humans enjoy.

Experts have argued that since robots have now acquired human-like qualities, it is appropriate to consider if they should have rights just as humans. Sophia has a human like face and utilizes artificial intelligence to respond to speech and express emotions. For such a lifelike being that is potentially capable of expressing emotions, does it not deserve the right to be loved and respected?

Robots should also be given legal and moral protection as harming a robot may be similar to harming humans. Since people tend to form attachments to social robots, it becomes possible for companies to control the hardware and software to exploit this emotional attachment. There is a danger that data that is stored in the robot could be uploaded to the cloud. There would then possibly be situations in which the government or private sector retrieves (检索数据) the information stored in a robotic toy or social robot. With these uncertainties, it is clear why robots should be protected, just as humans.

An even more irresistible reason to grant human rights to the robots is the protection of societal values. We should stop a young child from kicking or tearing a toy robot apart because it resembles a real life. Giving robots certain rights will ensure that societal standards are set.

Still, many have roundly argued that no matter how sophisticated (老练的) they may be, robots are still machines. It is therefore quite ridiculous to treat them as living beings and grant them rights. However, with the advancement in technology, it is a matter of time before robots are fully anthropomorphized (赋予人的特征), and we would have to consider granting them rights.

In conclusion, deciding whether robots deserve human rights is by no means an easy task, but now is the time to start the conversation on this and seriously consider the possibility.

For thousands of years, Chinese writers have travelled all over the country to take down notes about the geographical conditions of each city. Among them, well-known Chinese geographer and writer Li Daoyuan, in the Northern Wei Dynasty (386-534), composed his book, Commentary on the Water Classics, after studying the original literary version, Water Classics. He later expanded the river records to 1, 252 from the original 137.

The book is now being studied again by Professor Li Xiaojie and his team from Fudan University. They have been using drawing software and 3D modelling to recreate the waterway situations on a map based on the book description. So far, they have completed research on four rivers.

"Ancient people knew really well how to apply the power of nature to technical considerations," Li said, giving the example of Qianjin'e, one of the most famous ancient water conservation projects in Luoyang, Henan. In order to lead the river into the city for irrigation (灌溉) in ancient Luoyang, the officials built a canal branch by separating a northwest-southeast river. However, the canal water wasn't enough to support the citizens in dry seasons. To solve that, on the northern side of the canal branch, the officials built a reservoir (水库) and a channel to lead the water to the canal branch, where the waterways would converge and flow together to the city.

In Commentary on the Water Classics, a total of 2,800 cities are recorded with details. Still, the process of recreation takes much effort. After doing a lot of text analysis and fieldwork, the team has gradually created the model with 3D modelling software based on repeated deductions (推论).

For Professor Li, the book is not only a record of the natural landscape over 1,000 years ago, but also a detailed description of humanity and culture and a treasure for today's reference.

Do you continue to be healthy in social isolation? NASA is looking for people to spend 8 months locked in a Russian lab for a new experiment.

When humans go to the moon and travel to Mars, they will need to be prepared for long-term space travel and even longer stays on these far-off destinations. Currently, NASA's Artemis program aims to land humans on the moon for the first time since NASA's Apollo 17 mission landed in 1972.

While the moon is the main goal of NASA's Artemis program, the agency's larger goal is to send people to Mars. But long-term space travel and habitation won't be easy. Such missions will present both physical and mental challenges as astronauts work to not only survive, but perform important scientific research in uniquely difficult environments.

In the upcoming NASA-Russia experiment, a group of people will live in a closed facility at Russia's Institute for Biomedical Problems, which is in Moscow. This habitat facility was used in 2011 for notable series of Russian mock (模拟的) Mars missions known as Mars 500. During these missions, groups of people spent 520 and 105 days on two separate missions in the facility.

The facility, according to the statement, will have "environmental factors similar to those astronauts are expected to experience on future missions to Mars". The group of people will spend 8 months living together in isolation and working on scientific research.

By living and working in this Mars-like environment, participants in this study will help NASA researchers better understand the psychological and physiological (心理和生理的) effects of isolation. These missions help researchers not only perform relevant science experiments but also see how people might get on under strange conditions for long periods of time.

So, if you're finding that living in social isolation works for you, you might be particularly well-suited for living in a Mars-like environment and this could be for you. But first, you have to qualify. NASA is looking for "highly motivated" Americans between the ages of 30-55, who must speak both Russian and English fluently and have a Master of Science, Doctor of Philosophy, Doctor of Medicine, or military officer training. Applicants with other related experience may also be considered. Those who are chosen to be a part of this group will be paid for their work.