淤泥

yū ní féi

淤泥肥

sludge fertilizer

chén jī yū ní

沉积淤泥

deposit silt

gōng yè yū ní

工业淤泥

industrial silt

měi nián hé shuǐ fàn làn shí dōu huì zài tián yě shang chén jī yī céng yū ní

每年河水泛滥时都会在田野上沉积一层淤泥。

During the annual floods the river deposits its silt on the fields.

yū ní dǔ sè le xià shuǐ dào

淤泥堵塞了下水道。

Mud choked the drainpipe.