这是由例如Netflix公司等采用的模式。Netflix是一家加州公司，主要业务是向用户邮寄dvd，不过目前也提供流媒体下载电影的服务。

This is the approach taken by, for instance, Netflix, a Californian firm that mostly delivers DVDs to its subscribers by post, but now also streams films.

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Mr Poltrack设计了另一种给观众分类的方法，相比于年龄，他更强调观众对媒体的口味和态度（比如“体育迷”或者“网上冲浪者和流媒体下载者”）。

Mr Poltrack has devised an alternative way of classifying viewers that emphasises tastes and attitudes to media (for example as “sports enthusiasts” or “surfers and streamers”) rather than age.

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但如果他们一旦认为其将威胁到唱片销量和数字下载业务，这些音乐流媒体站点将会处于困境。

If they come to view them as competition for CD sales and digital downloads, the music-streaming sites are in trouble.

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