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小测验：选择正确的单词
- 论坛新贴
backup ['bækʌp]
基本释义
- n. 后援;
v. 把...做备份;
n.[计算机] DOS命令:备份, 将文件从一个磁盘复制到另一个磁盘上;
常用短语
- backup file
备份文件 - backup system
备用系统，后备系统
- backup file
参考例句
- We offer a free backup service to customer .
我们为客户提供免费的辅助性服务。
- We offer a free backup service to customer .
英英解释
5个名词解释
- an accumulation caused by clogging or a stoppage
[例]- a traffic backup on the main street
- he discovered a backup in the toilet
- someone who takes the place of another (as when things get dangerous or difficult)
[同] fill-in, backup, backup man, relief, reliever, stand-in, substitute
[例]- the star had a stand-in for dangerous scenes
- we need extra employees for summer fill-ins
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- an accumulation caused by clogging or a stoppage