n.污水；污物

The river was contaminated with sewage. 這河水被污水污染了。

The sewage pipes were choked with rubbish. 垃圾阻塞了污水管道。

The grave problem of public hygiene is connected with the inefficient sewage system of the city. 公共衛(wèi)生方面的嚴(yán)重問(wèn)題與該城低效率的污水處理系統(tǒng)有關(guān)。

Chemicals in the factory's sewage system have changed the ecology of the whole area. 這座工廠排出的化學(xué)物質(zhì)改變了整個(gè)地區(qū)的生態(tài)。