backup是什么意思

实用例句

1. Every part of the system has a backup.

系统的每个部分都有备用元件。来自柯林斯例句

2. The police had backup from the army.

警方得到了军方的增援。来自《权威词典》

3. She once sang backup for Madonna.

她曾经为麦当娜伴唱.来自《简明英汉词典》

4. Have you kept a backup of this file?

你把这文件备份了 吗 ?来自《简明英汉词典》

5. File in the target drived : BACKUP directory will be erased strike any key when ready.

目标驱动器标 d: BACKUP目录 内的文件将被删除,准备好后按任意键继续.来自互联网