题目内容

请列举3个基于动态原理设计的案例。

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试从身边选取一件产品，把它看成是一个动态的过程，例如音乐播放器，它从最早的留声机、录放机、CD播放机、到现在的MP3、MP4。请基于动态原理利用情境分析法分析播放器的前身今世和来生。

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