你必须使用某种形式的两个进程之间的信号交换。

You have to use some sort of signal exchange between the two processes.

youdao

在古代，士兵传递烟火信号来交换消息。

In the ancient time, soldiers sent smoke signals to exchange information.

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在古代，士兵传递烟火信号来交换消息。

In the ancient time, soldiers sent smoke signals to exchange information.

youdao