backup中文是什么意思

backup .名词 n.

1、帮助援助支持 military backup 军事援助

2、替代物备用品支援人员， 后备， 后补， 助手 a backup singer for Stevie Wonder 史蒂维·旺德的伴唱歌手 The hospital has a backup generator in case there is a power failure. 医院有备用发电机以防停电。 She once sang backup for Madonna. 她曾经为麦当娜伴唱。

3、(流水受阻造成的)阻塞泛滥(车辆等)拥塞

4、备份文件 a backup disk 备份磁盘 Have you kept a backup of this file? 你把这文件备份了吗? We had no computer backup and had to rely on old paper files to reconstruct the records. 我们没有计算机备份，只得靠落后的纸档案重做记录。