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我们必须净化环境。?。
We have to clean up the environment.
youdao
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防治污染、净化环境是当今社会的重要课题。
Pollution control and environment cleaning become the most important task in contemporary society.
youdao
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防治污染、净化环境是当今社会的重要课题。
Pollution control and environment cleaning become the most important task in contemporary society.
youdao