Countdown Timer / presentation

测量（倒计时）由用户定义的时间段中的应用。

Application to measurement (countdown) time periods defined by the user. The aim of the application is to motivate users in the role of speakers, followed be a time limit for his lecture (presentation).

features:

- adding lectures (speaker name, title lectures, presentations length of time in minutes)

- choice of any lecture from predefined lectures

- start/cancel countdown of lectures

keywords:

Countdown, Timer, presentation, board, blackboard