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BNC: 15901 COCA: 5476

backup

Word family
Related topics: Computers
back·up /ˈbækʌp/ ●○○ noun  
1 [countableC] something that you can use to replace something that does not work or is lost 备用品,后备
 Always have a backup plan.
什么时候都要有一个备用计划。
 a backup generator
备用发电机
2 [countableC] a copy of a computer document, program etc, which is made in case the original becomes lost or damaged 〔电脑文件、程序等的〕备份
 Make a backup of any work you do on the computer.
你在电脑上做的任何工作都要备份。
3 HELP[uncountableU] people or things that can be used to provide support and help if they are needed 后备人员;备用物品
 Army units can only operate if they have sufficient backup.
部队要有足够的后备力量才能作战。
 a backup team
后备小组
4 [countableC] American EnglishAmE someone who will play in a sports team if one of the other players is injured or ill 〔球队的〕替补队员 SYN reserve
 a backup goalie
替补守门员
Examples from the Corpus
From Longman Business Dictionary
backupback·up /ˈbækʌp/ noun [countableC]
COMPUTING a copy of information held on a computer that is put onto a DISK so that the information is not lost if there is a problem with the computer
Take a backup copy of the file to be converted.
back·up noun
Chinese
Syllable
Corpus

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