The reasoning is an attempt to align it with the endpoint address selection decision process. This process assumes the following steps.

这种层次划分的原因在于试图将它与端点地址选择决策流程结合起来。

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For example, to align all selected objects to the left, the primary selection object determines where to align the objects.

例如，要使所有选定对象左对齐，将由主选择对象来确定对象的对齐位置。

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