题目

  Sometimes successful health campaigns can have quite unexpected reactions. The years of warnings about skin cancer mean that Britons are happy to cover themselves in sunscreen or stay out of the sun altogether, but it also means that most of us are not getting enough vitamin D.   Scientists announced yesterday that Britons need to increase to three times the amount of vitamin D they get per day. They called on food producers to fortify(强化) their products with more of the vitamin and suggested people should consider taking supplements(补充物) to keep levels up. They also su缩写句子。 （1）灰色的云层低低地压在大森林的上面。 __________________________________________ （2）鲜为人知的图案竟有那么大的魅力。 __________________________________________