空气污染在城市和农村都已成为越来越严峻的问题。Air pollution has become a more and more serious problem

游客2024-08-03  9

问题 空气污染在城市和农村都已成为越来越严峻的问题。

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答案 Air pollution has become a more and more serious problem both in the cities and in the countryside.

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