当然，目前国外也有一些相对较小的指纹识别系统，比如数码人(Digitalor)公司的U-are-U系统,但他们的产品都存在价格昂贵、应用灵活性差、多使用光学传感器体积较大等问题。
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德克萨斯大学达拉斯分校的帕克和他的同事证明，学习编织或数码摄影可以增强老年人的记忆功能。
Park of the University of Texas at Dallas and colleagues demonstrated that learning to knit or do digital photography enhanced memory function in older adults.
这款名为“播放按钮”的装置源于这样一个现状，即人们已厌倦了CD，却又发现下载数码音乐并不能让人完全满足。
Called the Playbutton, the new device came out of the facts that people were tired with CDs, but finding digital music downloads not entirely satisfying.
然而这样的数据在数码音乐的历史上仍让人难以捉摸。
Yet those kinds of numbers have remained elusive throughout the history of digital music.
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