Sludge
01
the semi-solid residue produced during sewage or wastewater treatment
例子
The treatment plant removes sludge from the water before discharge.
Engineers studied the composition of the sludge to improve filtration.
02
any heavy, soft, wet, and often sticky material
例子
Mudslides left a layer of sludge over the road.
The machine 's filter was clogged with sludge.
