backup

中文意思

n. an accumulation caused by clogging or a stoppage
n. (computer science) a copy of a file or directory on a separate storage device

n. 备份
You should make a backup of your important files before updating the computer.
在更新电脑系统之前，你应该为重要文件做一份备份。
n. 后援
The police officer called for backup when he realized he was outnumbered.
当这名警察意识到对方人数占优时，他立刻呼叫了后援。
n. 积压阻塞
An accident on the highway caused a massive traffic backup during rush hour.
高速公路上发生的一起事故导致高峰时段出现了严重的交通积压阻塞。
v. 备份
I always backup my photo collection to an external hard drive every weekend.
我每个周末都会把照片集备份到移动硬盘里。
adj. 备用的
We need to prepare a backup plan in case the weather ruins our outdoor event.
我们需要准备一个备用方案，以防天气破坏我们的户外活动。