例句：
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 problems of traffic congestion will not disappear in a hurry.
交通堵塞問(wèn)題不會(huì)很快消失。
Traffic congestion is really bad at peak periods.
交通擁擠狀況在高峰時(shí)段真是糟糕透了。