iPad注重的是消费内容：浏览网页、观看视频、打游戏。
The iPad is all about content consumption--surfing the Web, watching videos, playing games.
一旦订阅了这类服务就意味着用户放弃了对所消费内容的所有权。
By subscribing to one of these services, they're relinquishing ownership over the content they consume.
但是一旦你试图从五花八门的消息来源消费内容时，这个体系就崩溃了。
But the system breaks down once you try to consume content from a variety of different sources in your own stream.
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