| 释义 |
●back sth up- to make a copy of a computer program, etc. in case the original one is lost or damaged备份；给（计算机程序等）做备份◆If you don't back up your files, you risk losing data.如果你没有给文件做备份，就会有丢失数据的风险。
- to move a car, etc. backward倒（车）；使后退◆Back the truck up a little so that other people can get past.把卡车向后倒一点，好让其他人过去。
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