back-up

back-up ['bæk'ʌp]  ['bæk'ʌp] 

back-up 基本解释

back-up在线翻译

备份

back-up 相关例句

名词

1. Do you have any back-ups in case I cannot be there?
    假如我不能来,你们有没有候补人员?

以上为单词解释
学习应用类查询