sewage

Untreated sewage flowed into the river after the storm. ▶

暴风雨过后，未经处理的污水流入了河里。

Investing in modern sewage treatment facilities is essential for protecting freshwater ecosystems and maintaining public health.

投资建设现代污水处理设施，对保护淡水生态系统和维护公共卫生至关重要。