说明：  1．用24小时制进行时间显示； 2．能够显示小时、分钟、秒； 3．上电后从“00：00：00”开始显示 代码完全正确，在试验箱上仿真也通过了的
(1. Conducted using 24-hour time display 2. Can display hours, minutes, seconds 3. After power from " 00:00:00" began to show code entirely correct, in the chamber on the simulation also passed)