In the case of music, Microsoft's PlaysForSure software proved flaky: not all music from all stores would play for sure on all players, and the iPod remained unchallenged.
在音乐领域，微软的PlaysForSure软件并不成功：并非所有商店里的所有音乐都一定能在所有播放器上播放。iPod仍然是不可战胜的。
In the case of music, Microsoft's PlaysForSure software proved flaky: not all music from all stores would play for sure on all players, and the iPod remained unchallenged.
在音乐领域，微软的PlaysForSure软件并不成功：并非所有商店里的所有音乐都一定能在所有播放器上播放。iPod仍然是不可战胜的。
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