device backup的用法和樣例：
例句
- So the shuttle might have to go to the backup site in California.
因此飛船有可能不得不在卡尼佛里亞后援區著(zhù)落。 - It could also provide backup power for extended operations if generators fail.
如果發(fā)電機出現故障，它還能為大范圍作戰提供后援能量。
詞匯搭配
- back up (因積聚而)擁堵...
