soft sludge

例句：

1. 1.The factory was producing soft sludge instead of clean water.
   工厂正在生产软污泥而不是干净的水。
2. 2. The river is full of soft sludge that needs to be cleaned up.
   这条河充满了需要清理的软污泥。
3. 3.The farmers used to use soft sludge as fertilizer for their crops.
   农民过去用软污泥作为肥料来种植他们的作物。