当宇宙飞船把摄像机对准地球时，会看到一个蔚蓝色的美丽星球。蔚蓝色是地球上大片海洋散射太阳光所形成的颜色，这说明，地球是一个水的星球。在地球上，无论你走到哪里——或在沙漠之荒，或在五洋之底，或在高山之巅——只要能发现水，就能发现某种形式的生命存在。水是生命 When the spacecraft pointed the camera at the earth, it would see a beautiful blue planet. The blue sky is the color formed by the scattering of sunlight on a large part of the earth’s oceans. This shows that the earth is a water planet. On Earth, no matter where you go - or in the desert, or on the bottom of the ocean, or on the tops of mountains - as long as you can find water, you can find some form of life. Water is life