pile up

US /paɪl ʌp/
UK /paɪl ʌp/
"pile up" picture
1.

堆積, 積壓

to accumulate or increase in quantity, especially to an unmanageable degree

:
The dirty dishes started to pile up in the sink.
髒盤子開始在水槽裡堆積起來
Work tends to pile up when you're on vacation.
度假時工作往往會堆積如山
2.

撞車, 堆積

to crash or collide, especially involving several vehicles

:
Several cars piled up on the icy road.
幾輛車在結冰的路上撞成一團
The accident caused traffic to pile up for miles.
事故導致交通堵塞數英里。