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；<美>(车辆等)拥塞
4.<计>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。
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