backup

/ˈbæˌkəp/

an accumulation caused by clogging or a stoppage

中文释义：积压；堵塞；备用

There was a backup of traffic on the highway due to an accident.

由于事故，高速公路上出现了交通堵塞。

The drain backup caused water to flood the basement floor.

下水道堵塞导致水淹了地下室地板。