一个备忘录，可以当一个闹钟使用，可以控制闹钟，可以控制定时关机的简单程序。-a simple clock

在工业生产控制系统中,有许多需要定时完成的操作,如定时显示当前时间(In the industrial production control system, there are many need time to complete the operation, such as timing, display the current time)

在工业生产控制系统中,有许多需要定时完成的操作,如定时显示当前时间(In the industrial production control system, there are many need time to complete the operation, such as timing, display the current time)