Just like the rest of the code in a typical Windows Forms application, any code that resides inside a timer event handler (for this type of timer class) is executed using the application's UI thread.

就像一个典型窗体程序里的其它代码一样，任何驻留在一个定时器事件处理函数(指的是该类型的定时器类)中的代码也是使用应用程序的UI线程所执行。

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In Power-save mode, the asynchronous timer continues to run, allowing the user to maintain a timer base while the rest of the device is sleeping.

在省 电模式下，异步定时器继续运行，允许用户保持一个时间基准，而其余功能模块处于休眠 状态；

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