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關于環境保護(水資源節約)的話題

網友回答:

the air was fresh and the river was clean.but now, we should plant many trees to keep water. second , we shouldn’t throw the dirty water into the river . fourth, we can ask more people to join us.關于環境保護(水資源節約)的話題, the clean water and so on . in the past,

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