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backup

US [ˈbækˌʌp]
UK [ˈbækʌp]
  • n.后援;增援;(文件等的)备份
  • adj.后补的;支持性的;伴奏的
  • Web备份文件;备份成功;后备
Plural Form:backups  
BACKUP
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n.
1.
增援;后援extra help or support that you can get if necessary
The police had backup from the army.
警方得到了军方的增援。
We can use him as a backup if one of the other players drops out.
如果有参赛者退出,我们可以用他作为替补。
a backup power supply
备用电源
2.
(文件等的)备份a copy of a file, etc. that can be used if the original is lost or damaged
Always make a backup of your work.
所有文件都须备份。
a backup copy
备份文件

Sample Sentence

Definition:
Category:AllAll,OralOral,WrittenWritten,TitleTitle,TechnicalTechnical
Source:AllAll,DictionaryDictionary,WebWeb
Difficulty:AllAll,EasyEasy,MiddleMiddle,HardHard
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