处理环境与中断环境之间的主要差别是：当处于中断环境中时，不允许出现任何页面错误。

The main difference between the process and interrupt environments is that no page faults are permitted while in the interrupt environment.

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例如，在列表中的一个项目上使用unset将打乱所有后续项目的索引，索引集中不允许存在任何中断。

For example, unset on an item in a list will cause the indices of all subsequent items to be shuffled up; there are no holes allowed in the set of indices.

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用来修饰或说明处理设备的一种状态，在这种状态下不允许发生某些类型的中断。

Pertaining to a state of a processing unit in which certain types of interruptions are not allowed to occur.

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