图20 .合并别名更改过的模型。
Figure 20. Merging a model where the alias has been changed.
级备份会保存自从执行0级备份以来更改过的所有文件。
A level 1 backup would save all of the files that had changed since the level 0 backup was done.
例如，清单4显示如何更新自上一次更新之后更改过的包。
For example, Listing 4 shows how to update packages that have changed since the last update.
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