water-borne contaminant

例句：

1. 1.The river was heavily polluted by industrial waste.
   这条河因工业废物而严重污染。
2. 2.The government is working to reduce the amount of water-borne contaminants in our city.
   政府正在努力减少我们城市水中的污染物。
3. 3. The contaminated water had to be treated before it could be released into the environment.
   受污染的水必须先经过处理才能排放到环境中。