托管线程或者是后台线程，或者是前台线程。
A managed thread is either a background thread or a foreground thread.
安装一个钩子子程，当应用程序的前台线程即将空闲时，该子程被调用。
Installs a hook procedure that will be called when the application's foreground thread is about to become idle.
系统在应用程序的前台线程即将空闲时，调用WH _ FOREGROUNDIDLE钩子子程。
The system calls a WH_FOREGROUNDIDLE hook procedure when the application's foreground thread is about to become idle.
在前台垃圾收集完成之后，后台垃圾时线程和应用程序的线程就继续它们的工作。
After this foreground GC is finished, the background GC thread and the user threads can resume their work.
解释了前台和后台线程的区别。
Explains the differences between foreground and background threads.
除此之外，当应用程序的用户界面在前台和后台之间移动时，操作系统还可以动态调整线程优先级。
On top of all that, the operating system can also adjust thread priorities dynamically as an application's user interface is moved between foreground and background.
除此之外，当应用程序的用户界面在前台和后台之间移动时，操作系统还可以动态调整线程优先级。
On top of all that, the operating system can also adjust thread priorities dynamically as an application's user interface is moved between foreground and background.
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