简单的视频播放器 。系统使用Qt开发，在Windows系统下使用QT库phonon 。-Simple video player. System developed using Qt on Windows systems using the QT library phonon.

Entropy is a measure of the number of specific ways in which a system may be arranged, often taken to be a measure of disorder. The entropy of an isolated system never decreases, because isolated systems spontaneously evolve towards thermodynamic equ