to bunch up
01
聚集, 形成一束
form into a bunch
02
聚集, 挤在一起
to become congested or gather closely together, often referring to traffic or crowds becoming tightly packed or slowed down
例子
The traffic bunched up on the freeway due to an accident ahead.
由于前方事故，高速公路上的交通拥堵了。
