说明：  能够设定年、月、日；时、分、秒、毫秒；并且可以设定准时的时间，可以精确到毫秒；当设定时间到后自动闹铃，同时设计显示时间的代码。
(Be able to set year, month, day hours, minutes, seconds, milliseconds and can set the time period can be accurate to milliseconds When the time is automatically set the alarm, while designed to display the time code.)