No DRM system was ever developed for the CD, so all the music distributed on CDs can be easily uploaded to the Internet, then (illegally) downloaded and played on any computer or player.
CD上从来也没有过DRM系统，所以所有CD上的音乐都可以轻易传上互联网，然后被(非法地)下载到任何电脑上，在任何播放器上播放。
Since there is no common DRM standard, songs purchased for one type of music player may not work on another.
由于现在并无一个共同的数字版权管理标准，所以为这种音乐播放器购买的歌曲可能在另一种播放器上就听不了。
Since there is no common DRM standard, songs purchased for one type of music player may not work on another.
由于现在并无一个共同的数字版权管理标准，所以为这种音乐播放器购买的歌曲可能在另一种播放器上就听不了。
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