Wikipedia, the online encyclopedia (百科全书), is the largest encyclopedia ever. An encyclopedia is a collection of informative articles about various things. Encyclopedias used to be printed as books. 【1】“Wiki”is an internet term that means”a website that can be edited by the public. “It comes from”wikiwiki”，a Hawaiian word for”quick”. Two Americans, Jimmy Wales and Larry Sanger, created Wikipedia in 2001.【2】It has about 6 million articles in 300 languages and is visited by billions of people each day,who want to find information on just about anything-science, m