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单词 back up
释义

back up

[phrasal verb]
1 
a  : to move backward后退;倒退
— sometimes used figuratively有时用作比喻
b  back (a vehicle) up or back up (a vehicle) : to move (a vehicle) backward倒(车)
2 
a  : to become blocked so that movement or flow is slowed or stopped堵塞;淤积
b  back (something) up or back up (something) : to cause (something) to become blocked使淤积;使堵塞
3 
back (someone or something) up or back up (someone or something) : to give help or support to (someone or something)支持;帮助
— see also 4back 1e (above)
4 
back (something) up or back up (something) computers : to make a copy of (a computer file or data) to protect it from being lost备份;存储
— see also backup
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更新时间:2026/10/9 7:38:16