地球上的水是哪里来的? 对这个问题,科学家们一直在探索。一种观点认为,地球上的水是在地球形成时,从宇宙物质中分离出来的;而在地球形成以后,从地球内部不断析出水分聚集在地表,这由今天的火山活动可以得到证实。从地下分离出水的规模现在还很大,一次火山爆发,它喷出的水蒸汽就可达到几百万公斤。可以想见,在漫长的 Where's the Water on the Earth? Scientists have been exploring this issue. According to one view, water on Earth is separated from cosmic material when the Earth is formed. After the Earth is formed, water is continuously precipitated from the Earth's surface and accumulated on the earth's surface. This is confirmed by today's volcanic activity. The scale of the water that is separated from the ground is still large. A volcanic eruption can reach millions of kilos of water vapor. Can imagine, in the long