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太少,太难找 解决全球水危机 Sasha Henriques 地球上只有2.5%的水是不含盐的淡水。而在这一极小份额中,可供我们利用的不 到1%。其余的水冰冻在冰盖和冰河中,或存在
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Document Date: 2014-06-04 11:39:39
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