地球上有一片蓝色,因为有了它,地球才如此美丽,这就是海洋。约66亿年前,银河系发生过一次大爆炸,其碎片星云物质经长时间聚集,于46亿年前形成太阳系。作为太阳系成员之一的地球亦由此形成。固体地球形成后,由于大量小天体的轰击,火山作用异常强烈且频率极高。喷发时地球内部溢出大量的气体,并释放出大量的水蒸气,由此形成了地球的 There is a blue earth, because with it, the earth is so beautiful, this is the ocean. About 6.6 billion years ago, a big bang occurred in the Milky Way. Its fragments of nebula material gathered for a long time and formed the solar system 4.6 billion years ago. The Earth, one of the members of the solar system, is thus formed. After the solid earth is formed, due to the bombardment of a large number of small celestial bodies, the volcanism is unusually strong and the frequency is very high. When the eruption of the earth spilled a large amount of gas, and release a lot of water vapor, which formed the Earth’s