沈括是我国北宋时期一位卓越的科学家。他博学多才,一生积极从事科学研究活动。他不仅精通数学、物理、化学、生物、医药等多方面的知识,还会识天呢。有一年久旱无雨,农作物普遍缺水,人人都盼雨心切。不久,出现了一连几天的阴天,大家都以为天会下雨了。可是滴雨未下,天又转晴了,阳光强烈地炙烤着 Shen Kuo is a remarkable scientist in Northern Song Dynasty in China. He learned a lot, actively engaged in scientific research activities throughout his life. He not only proficient in mathematics, physics, chemistry, biology, medicine and other aspects of knowledge, but also know it. There is a long time without rain, crops generally water shortage, everyone is eager to rain. Soon, there appeared a cloudy day for several days, everyone thought it was going to rain. But the rain did not drop, the sky was sunny again, the sun roasted strongly