Noun:

1. excessive accumulation of blood or other fluid in a body part

2. excessive crowding;

   "traffic congestion"
   

overcrowdingn.过度拥挤；挤满动词overcrowd的过去式和过去分词.

mobbingn.暴民；一伙；[贬]民众vt.大举包围；蜂拥而入

crammingn.塞满；挤满；填鸭式的用功

bottleneckn.瓶颈v.阻塞；妨碍adj.狭窄的

jammingn.干扰；堵塞；抑制

crowdingn.拥挤动词crowd的现在分词.

blockingn.阻塞；舞台调度；[计]组块动词block的现在分词形式.

blockagen.封锁；障碍；[医]阻塞

cloggingn.阻塞；闭合；结渣动词clog的现在分词形式.

obstructionn.障碍；妨碍；闭塞；违例阻挡

over-crowdingn.过于拥挤

1. Congestion frequently reduces traffic to walking pace.
   交通阻塞经常把车流的速度降低得如步行一般缓慢。
2. Congestion really is a long-standing problem in Beijing.
   交通阻塞的确是北京的老大难。
3. The route was designed to relieve traffic congestion.
   这条路是为缓解交通拥挤而开辟的。
4. Nose drops often relieve nasal congestion.
   滴鼻剂常可缓解鼻腔充血。
5. I'm afraid there is a congestion in your left arm.
   恐怕你的左臂上有一些淤血。