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. 倒车, 后退, 后援, 支持, 阻塞
vt. 做备份
a. 候补的, 支持的
[计] 备份; DOS外部命令:通常使用于将硬磁盘上指定的文件复制到软盘上
1. I always make a backup of my files before updating my computer.
我总是在更新电脑之前备份我的文件。
2. It is important to have a backup plan in case something goes wrong.
制定一个备份计划是很重要的，以防出现问题。
3. The company keeps a backup of all its data in the cloud.
公司在云端保存了所有数据的备份。