1
make/create a backup of sth
You should make a backup of all important files.
你应该把所有重要文件都做一个备份。
因堵塞或停止而造成的积累
先理解核心含义，再看它在真实句子里的用法。
因堵塞或停止而造成的积累
an accumulation caused by clogging or a stoppage
You should make a backup of all important files.
你应该把所有重要文件都做一个备份。
储备或替代品
A reserve or substitute.
因堵塞或停止而造成的积累
an accumulation caused by clogging or a stoppage
文件或记录的副本,与原件分开存储,可用于恢复原件
A copy of a file or record, stored separately from the original, that can be used to recover the original if it is damaged or destroyed.
在危险或困难时替代他人的人
someone who takes the place of another (as when things get dangerous or difficult)
The heavy rain caused a backup in the drainage system.
大雨导致排水系统堵塞。
AI contextual example
Traffic was slow due to a backup on the interstate.
由于州际公路上的车辆堵塞，交通缓慢。
AI contextual example
The plumber cleared the backup in the kitchen sink.
水管工疏通了厨房水槽的堵塞。
AI contextual example
a traffic backup on the main street
主街上的交通堵塞
WordNet
You should make a backup of all important files.
你应该把所有重要文件都做一个备份。
The generator serves as a backup for the main power supply.
发电机作为主电源的后援。
Keep a backup of your data on an external drive.
在外部驱动器上保存一份数据的备份。
Not this
I have two backup of the file.
Use this
I have two backups of the file.
backup 作为'备份'是可数名词，复数形式为 backups。中文中'备份'没有复数变化，因此容易遗漏-s。
Not this
Please backup the file before closing.
Use this
Please back up the file before closing.
名词 backup 不能直接作动词，应使用动词短语 back up。注意词性和拼写区别。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
做备份
You should make a backup of your files before updating the software.
在更新软件之前，你应该给文件做个备份。
备用计划
We have a backup plan in case the original venue is unavailable.
万一原来的场地不能用，我们还有备用计划。
备份文件
The backup file is stored on an external hard drive.
备份文件储存在外置硬盘上。
从备份恢复
She restored the document from a backup after it was accidentally deleted.
文件被意外删除后，她从备份中恢复了该文档。
伴唱歌手
She started her career as a backup singer for a famous band.
她的职业生涯始于为一个著名乐队当伴唱歌手。
备用发电机
The hospital has a backup generator for power outages.
医院备有备用发电机以应对停电。
Use backup naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
联想“back（背后）+ up（往上）”：把重要文件往背后高处多存一份，就是备份；堵车时车辆积压成队，也像多出来的一排“后备”。
语域：mixed 常见场景：computing/data storage、traffic reports、replacement/standby people backup 作名词时，语域随使用场景变化：在计算机数据备份和正式书面语中通常为中性，在口语中指替补人员或后备力量时比较常见，在交通报道中表示拥堵也很自然。
可数名词，表示备份或支持的意思。
Dictionary facts from DICTIONARY_API_DEV, ECDICT, WIKTIONARY.