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backup
1 ENTRIES FOUND:
plural backups
plural backups
Learner's definition of BACKUP
1
a [count] : a person or thing that can be used to replace or support another person or thing后备人员；备用物品 — often used before another noun常用于另一名词前
- His role on the team is to be a backup to the regular quarterback.他是球队主力四分卫的替补。
- We have an extra radio as a backup in case this one doesn't work.我们有一台备用收音机，以防这台出问题。
- a backup quarterback替补四分卫
- We need a backup plan in case of emergency.我们要有一个应急预案。
b [noncount] : help or support provided by additional people or things增援；支援；后援
- The policeman called for backup [=called for other police to come and help him] because the suspect was carrying a gun.由于嫌犯手里有枪，警察请求增援。
- We have an extra radio for backup.我们还有一台备用收音机。
- He provides backup for the regular quarterback.他担任主力四分卫的替补。
2
[count] US : a situation in which the flow of something (such as traffic) becomes blocked（交通等）堵塞，不畅
- There was a traffic backup [=(Brit) tailback] for miles on the road because of the accident.受事故影响，拥堵在路上的车辆长达数英里。
- There was a backup [=blockage] in the drain.下水道堵了。
3
[noncount] : a musical part that is sung to support the main singer伴唱；伴奏 — often used before another noun 常用于另一名词前
- She sang backup on his CD.她在他的唱片里伴唱。
- a backup singer 伴唱歌手
4
[count] : a copy of information stored on a computer（资料的）备份 — often used before another noun 常用于另一名词前
- Be sure to make a backup of your work.一定要把你的文件做个备份。
- a backup file/copy 备份文件；
also : the act or process of making such a copy备份（过程） — see also back up at 4back
- It may take some time for the backup to be complete.完成备份可能需要点时间。
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