记住重设会清除所有的内容和设置，重设之前请全部备份。

Note that this will erase all settings - perform a full backup beforehand.

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而在文件系统备份中，要么是全部恢复，要么一个也不恢复。

A file system backup, on the other hand, is all or nothing.

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每个连续的增量映像都包含前一个增量映像的全部内容，以及前一个完全备份以后所做的更改。

Each successive incremental image contains the entire contents of the previous incremental image, and the changes since the previous full backup.

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