The kernel thread and the application thread will handshake with each other.
内核线程和应用程序线程需要相互进行握手。
In nearly every server application, the question of thread pools and work queues comes up.
几乎在每个服务器应用程序中都会出现线程池和工作队列问题。
The point here is that if your code is running on the UI thread, the application can't handle UI events from the OS.
问题的重点在于如果UI线程在运行您的代码，应用程序将无法再处理来自OS的UI事件。
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