That shift, in turn, place an unprecedented premium on "knowledge workers", a new class of wealthy, educated, and mobile people who view themselves as free agents in a seller's market.

反过来，这种转变又给“知识工人”带来了前所未有的好处，这是一个新的阶层，由富有、受过教育、流动性强的人组成，他们认为自己是卖方市场上的自由代理人。

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In the media world, this has taken the form of a shift from ad-supported free content to freemium - free samples as marketing for paid services - with an emphasis on the "premium" part.

媒体世界已经从广告支持的免费内容向免费增值模式转变：用免费的样本为付费服务做营销，重点在于附加收费部分。

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For the long term, it hopes to achieve sales growth through higher traffic, a shift towards premium products and menu price increases.

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YouTube's shift into premium paid-for channels raises the stakes in the fast-evolving online video sector, which is beginning to resemble the early days of cable television before it grew into a multibillion-dollar business.

CNN: YouTube to switch on paid-for video

We believe Windows Pricing for PC Makers will decline gradually over the forecast period due to a shift from premium Windows to lower-priced versions driven by higher demand in emerging markets and demand for lower priced editions for netbooks.

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