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back up

phrasal verb
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back up | back something up
  1. to move backwards, especially in a vehicle后退；倒（车）
    • You can back up another two feet or so.你可以再退两英尺左右。
    • I backed the car up to the door.我把车倒到门前。
    • Can you back your car up so that I can get through?你能不能把车倒一下让我过去？
back somebody/something up
  1.  
     to support somebody/something; to say that what somebody says, etc. is true支持；证实（某人所言）
    • I'll back you up if they don't believe you.如果他们不相信你，我会为你作证。
    • The writer doesn't back up his opinions with examples.作者没用实例印证他的看法。
  2. to provide support for somebody/something支持；支援
    • two doctors backed up by a team of nurses由一组护士辅助的两名医生
    • The rebels backed up their demands with threats.反叛者以恐吓手段要挟。
    related noun backup
back something up
  1. (computing计算机) to prepare a second copy of a file, program, etc. that can be used if the main one fails or needs extra support备份：准备文件，程序等的第二个副本，如果主副本出现故障或需要额外的支持，则可以使用该副本
    • It's a good idea to back up your files onto a memory stick.把你的文件备份到记忆棒上是个好主意。
    related noun backupTopics Computersc1

See also: back up

back up phrasal verb
⇨ confirm 2

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