Traditionally, this process was time consuming for users as they visited each Web site, poking around for new information before moving on to another Web site.

传统上，此过程非常消耗用户的时间，因为他们要访问每个Web站点到处寻找新信息，然后再移动到下一个Web站点。

youdao

This also happens to be the site of its 80-day moving average, a trendline that has marked many peaks and troughs since 2008.

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"We knew this would cause our site to grow more slowly, but we think the world is moving in our direction, " says Facebook privacy chief Christopher Kelly.

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Google is also moving to add professional content on its YouTube video site, and is planning to roll out a digital bookstore this year.

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