说明：  相当与一个播放器，可以播放wav格式文件，并且可以实现暂停功能。由于另外还做了个显示时间的程序，虽然关系不大，但想了想还是把它也加了进去，这样也就可以显示时间了。
(Rather with a player that can play wav format, and can pause function. As also made a display time of the procedure, although the relationship is not, but thought it was also added in, so also can display the time.)