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Acid rain has caused serious problems in many parts of the world.
酸雨已经在世界许多地区引起了严重的问题。
youdao
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This is the most serious acid rain problem in the world.
这是世界上受酸雨困扰最严重的地方。
youdao
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This is the most serious acid rain problem in the world.
这是世界上受酸雨困扰最严重的地方。
youdao