n.堆積；連環(huán)相撞

The problem delayed some flights at the New York airport and caused a luggage pileup at ticket counters. 該問題造成一些紐約機場的航班延誤并使得乘客行李在票務處堆積如山。

There is a serious pileup on the expressway. 高速公路上發(fā)生了一起的汽車追尾相撞的交通事故。

Stopping the car short caused a pileup on the superhighway. 這輛汽車突然剎車使高速公路上發(fā)生連環(huán)車禍。