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
网络 备用; 后备; 备份的
There is no emergency back-up immediately available.
没有立即就能获得的后备。
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。
Homes lacked back-up power generators.
家里也没有备用的发电机。
You can back up another two feet or so.
你可以再退两英尺左右。
That sort of attitude really gets my back up!
那种态度实在叫我恼火!