只是把它看成一种会熏黑房屋，弄脏河流的令人讨厌的东西。

Until recently pollution was regarded as a nuisance that blackened buildings and sullied streams rather than a threat to human health.

youdao

只是把它看成一种会熏黑房屋，弄脏河流的令人讨厌的东西。

Until recently pollution was regarded as a nuisance that blackened buildings and sullied streams rather than a threat to human health.

youdao