Sometimes, we need to have people connected to their machine, or to see whether...

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有时候，我们需要是否有别人连接到自己机子上，又或者自己想看看是否连接到一定的端口，那么这个例子相信你很喜欢-Sometimes, we need to have people connected to their machine, or to see whether they want to connect to a port, then this example you like