时钟测试进入后先显示当前日期和时间然后时间日期归位到初始状态并播放响铃可能是测试闹铃效果
After the clock test enters, the current date and time are displayed first, then the time and date are reset to the initial state and a bell is played. This might be a test for the alarm effect
以上为机器翻译结果，长、整句建议使用 人工翻译 。