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关注：1
2013-05-23 12:21
求翻译：since nearly 70% of the earth's surface is covered with water.But about 97% of that is sea water, or salt water. Man can only drink and use the other 3%-the fresh water from river, lakes, undergound, and other sources. And we can not even use all of that. Even worse ,some of it has been make dirty.是什么意思？ 待解决
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since nearly 70% of the earth's surface is covered with water.But about 97% of that is sea water, or salt water. Man can only drink and use the other 3%-the fresh water from river, lakes, undergound, and other sources. And we can not even use all of that. Even worse ,some of it has been make dirty.
问题补充： |
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