| 释义 |
back-up
英音 [ bæk ʌp ]
美音 [ ˈbæk ʌp ]
释义
n. 援助，帮助；后备人员，备用物品；备份，副本；堵车
adj. 备用的，后备的；备份的
例句
1·There is no emergency back -up immediately available.
没有立即就能获得的后备。
《柯林斯英汉双解大词典》
2·As a result, they have lost the parachute they once had in times of financial setback—a back -up earner (usually Mom) who could go into the workforce if the primary earner got laid off or fell sick.
因此，它们已经失去了在经济萧条时期曾经持有的“保护伞”——一个后备挣钱者（通常是母亲），她可以在主要挣钱者失业或者病倒的时候出去工作。
3·Homes lacked back -up power generators.
家里也没有备用的发电机。
短语
1·backup and recovery
备份与恢复
2·backup and restore
备份与还原
3·backup system
备用系统；后备系统
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