| 释义 |
back·up AHD[băkʹŭp'] D.J.[ˈbækˌʌp]K.K.[ˈbækˌʌp]n.（名词）- A reserve or substitute.改变或替代
- Computer Science A copy of a program or file that is stored separately from the original.【计算机科学】 备份：从原文中独立出来单独贮存的程序或文件的副本
- Support or backing.支援或支持
- Music A background accompaniment, as for a performer.【音乐】 伴奏：为一个演奏者配音伴奏
- An overflow or accumulation caused by clogging or by a stoppage:阻塞：由阻碍或停顿引起的泛滥或堆积：a backup in the sink; a backup of traffic at the drawbridge.下水道堵塞；吊桥上的交通阻塞
adj.（形容词）- Extra; standby:额外的；替补的：a backup pilot.候补飞行员
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