water supply and sewerage works

例句：

1. 1. The city's water supply and sewerageworks are a major concern for the environment.
   该市的供水和下水道工程是环境的主要关注点。
2. 2. The construction of new sewerage works is expected to improve thecity's sanitation.
   预计新的下水道工程将改善城市的卫生状况。
3. 3. The wastewater from the factories needs to betreated before it can be discharged intothe water supply and sewerage works.
   工厂产生的废水需要经过处理才能排放到供水和下水道工程中。