Our Blue Ocean我们的蓝色海洋

If we look at our planet from a long way away， it is not yellow like the Sun， nor white like the Moon—it is blue. Blue is the color of the oceans， and about 71 percent of the surface of our planet is ocean.

More animals live in the oceans than on the land. This is possible only because there is so much food in the oceans. Where does the food come from？ The first food of our oceans is plants. If you take all the plants out of the oceans， very few animals can live there. To make their food， plants need water and sunlight. They also need minerals， and the minerals come from the land.

So life in the oceans is possible only with help from the land. But the opposite is also true： life on land is possible only with help from the oceans. We need water to live， and that comes to us from the oceans. Rain clouds take water from the oceans， and ocean winds carry the clouds over the land， where the rain falls onto our fields and into our rivers.

如果从遥远的地方观察地球，你会发现地球既不像太阳那样是黄色的，也不像月球那样是白色的。（剩余1471字）