sludge and refuse

例句：

1. 1.The sewage system is responsible for treating the sludge and refuse from the city.
   污水处理系统负责处理城市产生的污泥和废物。
2. 2. The factory produces a lot of sludge and refuse that needs to be disposed of properly.
   工厂产生大量的污泥和废物，需要妥善处理。
3. 3.The waste management department is responsible for collecting and recycling sludge and refuse.
   废物管理部门负责收集和回收污泥和废物。