Acid rain is a serious problem in central, southern, southwestern and eastern China.
酸雨是中国东部，西南部，南部，以及中部的严重问题。
The Sichuan basin is a basin in southwestern China. It comprises the central and eastern parts of Sichuan province, as well as Chongqing Municipality.
四川盆地是中国西南部的一个盆地。它由四川省的中东部和重庆市组成。
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