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Good idea, because factories always pollute the environment by pouring waste water directly into rivers.
好主意，因为工厂经常排出的废水直接流进河里污染环境。
youdao
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Good idea, because factories always pollute the environment by pouring waste water directly into rivers.
好主意，因为工厂经常排出的废水直接流进河里污染环境。
youdao