99秒表语音播报：计时精度达到0.01s，并且加上语音系统，使得记录的数据更具直观性。还可以对秒表上一次计时时间进行保存，供使用者查询。-99 stopwatch voice broadcast: timing accuracy of 0.01s, and coupled with the voice system, making record data more intuitive. Once timed on a stopwatch can also be saved for user qu