Pay walls make it difficult for news to go viral.

付费权限只能让新闻难以传开。

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The questions are hypothetical, and people may react differently when and if pay walls actually go up.

这些问题都是假设的，一旦付费墙真的构建起来人们也许会有不同的反应。

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This was the severest of pay walls, and the initial circulation was just 1,000, soaring to 3,000 by the mid-1820s.

这个价钱已经在当初已经算压到了底限，而卫报的发行量也因此由最初的1000份飙升到19世纪20年代中期的3000份。

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Visitors pay twenty-five dollars each to walk beyond the canyon walls, surrounded by the canyon, while standing at the edge of the glass bridge.

VOA: special.2009.10.07

"We don't want to beat people over the head with pay walls, " says Kazim.

FORBES: Magazine Article

The newspapers that have built successful pay walls tend to hold virtual monopolies over news in their region.

ECONOMIST: Charging for newspapers online

Pay walls, subscribers and the journalist angst over ads tell the tale.

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