就因为我没有备用一份。
Save backup copies of these personal folders files.
保存这些个人文件夹文件的备份副本。
You can find one of those backup copies and reactivate it.
因为可以在这些备份拷贝中找到一个，并重新激活它。
As a DBA, business rules will usually dictate how long you should keep backup copies.
作为一名DBA，业务规则通常会决定您应该保留备份副本的时间长度。
Compressed backups work only with backup sets, not image copies.
压缩的备份只对备份集有效，对映像副本无效。
Compressed backups work only with backup sets, not image copies.
压缩的备份只对备份集有效，对映像副本无效。
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