---------(污染)air does harm to our health,it's necessary to k

问题描述:

_________(污染)air does harm to our health,it's necessary to keep air fresh and clean
1个回答 分类:英语 2014-10-01

问题解答:

我来补答
contaminated,被污染的.
规范的科技文献中polluted一词很少用,通常用作名词,如air pollution control,water pollution management 等.
仅供参考.
祝好
 
 
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