在远古的海洋里,生活着很多水生动物。它们有的体型大,有的体型小,甚至还有很多浮游生物。当这些生物一代一代的死去,它们的尸骸就沉积在海底。有的骨骼变成了化石,但由于海洋中有很多盐分,它们身上的脂肪和蛋白质不能马上被降解(就好像腌咸鱼一样,可以储存很长时间)由于海底的水压很大,所以长年累月动物和微生物的尸体就逐渐被压缩。在强大的压力下,脂肪和蛋白质逐渐液化,变成了石油,存在于沉积岩中。石油是现今世界上应用最广泛的能源。我们用的汽 In the ancient sea, there are many aquatic animals. Some of them are big, some are small, and there are even many plankton. When these creatures die from generation to generation, their remains are deposited on the sea floor. Some bones become fossils, but their fats and proteins can not be immediately degraded due to the salt in the ocean (just like salted fish, which can be stored for a long time). Because of the high water pressure in the sea, so many years The bodies of animals and microbes are gradually compressed. Under strong pressure, fats and proteins gradually liquefy into oil, which is found in sedimentary rocks. Oil is the most widely used energy in the world today. We use steam