Display a warning when attempting to paste codes and none were found.
显示一个警告，试图将其粘贴代码时，并没有发现。
The system realizes the function of display, inter_conversation, unlocking and warning. It is valuable.
系统实现了显示、对讲、开锁、报警等功能，具有实用价值。
The system realizes the function of display, inter_conversation, unlocking and warning. It is valuable.
系统实现了显示、对讲、开锁、报警等功能，具有实用价值。
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