好主意，因为工厂经常排出的废水直接流进河里污染环境。

Good idea, because factories always pollute the environment by pouring waste water directly into rivers.

youdao

好主意，因为工厂经常排出的废水直接流进河里污染环境。

Good idea, because factories always pollute the environment by pouring waste water directly into rivers.

youdao