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一、自然界中的水 学者们估计,地球的年龄大约有45亿年。在地球形成时,它被各种各样灼热的气体所环绕。经过长时间的冷却后,这些气体中的氧(O)和氢(H)结合形成奇怪的云雾。以后,在数千年中,一直不停地下雨。 在那以后,地球上的水量就一直保持为一个常量。水充满着地壳的褶皱和凹陷部分,覆盖地表的3/4,且水的深度极为可观。当世界上最高的山峰
First, water scientists in nature estimate that the Earth is about 4.5 billion years old. When the earth is formed, it is surrounded by a variety of hot gases. After a long period of cooling, the oxygen (O) and hydrogen (H) in these gases combine to form weird clouds. After a few thousand years, it has been raining. Since then, the amount of water on Earth has remained constant. Water fills the crust and depression of the crust, covering 3/4 of the earth’s surface, and the depth of the water is extremely impressive. When the highest mountain in the world