Some have argued that once a consumerpurchases a body of music from one of the proprietary music stores, they areforever locked into only using music players from that one company.
一些人已经讨论说，一旦一名消费者从一个自有体系的商店中购买了一部音乐作品，它们就永远地被锁定到那家公司唯一指定的音乐播放器上了。
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