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a长了一半的草
我认为是水和汽车排放的尾气导致这些问题的英文：I think it is the water and car emissions that lead to these problems.
qieerdingdon
reduce vehicle emissions可以在GOOgle字典中查到哦~!
CuteGourmet
With the increase of car, car emissions out a large number of exhaust steam cause air pollution.
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