n.阻塞；擁擠；充血

Congestion frequently reduces traffic to walking pace. 交通阻塞經(jīng)常把車流的速度降低得如步行一般緩慢。

The route was designed to relieve traffic congestion. 這條路是為緩解交通擁擠而開辟的。

Nose drops often relieve nasal congestion. 滴鼻劑常可緩解鼻腔充血。

I'm afraid there is a congestion in your left arm. 恐怕你的左臂上有一些淤血。