data backup system的用法和样例：
例句
- You are strongly recommended to take a backup of your system before major installation and backups at regular intervals.
强烈推荐您在重大的安装前备份系统，并且做到定期备份。 - The laptop computer in her satchel is turned off, but its disk is filled with bits and pieces of other people's files, as part of a distributed backup system.
在她背包里的笔记型电脑虽然关掉了，但硬碟里仍装载了其他人档案的位元片段，这是分散式备份系统的一部份。
