Some operations simply cannot be undone because they involve some action that triggers a device not under the direct control of the program.

一些操作不能撤销，因为其中调用了不在程序直接控制下的设备。

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The county to achieve the urban and rural telephone program control, county, township and village full realization of international and domestic long-distance direct-dial telephone.

全县实现了城乡电话程控化，县、乡、村全部实现了电话国际国内长途直拨。

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