... 水占地球表面的百分之70 Water covers more than 70% of the earth’s surface. 有充足的水 be rich in water 需要大量的水 need great quantities of water ...
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Even though our earth is rich in water resource, there is still a shortage of water in many places because ocean water can't be used directly.
尽管地球的水资源丰富，但由于海水不能直接被利用，所以仍有许多地方缺水。
For example, the farmland of winter wheat should be reduced in northern China, while southern China, rich in water resources, should maintain multi-cropping.
例如，中国北方的冬小麦农田应该减少，而在水资源丰富的中国南方应该维持多茬复种。
The core could be very, very rich in hydrogen (a water ingredient) or totally dry.
地核中可能有巨量的氢（水分子的一种组分）或者完全干燥。
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