Once in the stratosphere and above the weather, smoke can linger for a long time and spread around the globe.

一旦进入平流层，烟雾即可停留相当长一段时间并扩散到全球。

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The photo shoot, styled by the magazine's long-time editor, Carine Roitfeld, provoked outrage today as its subject spread through Internet forums and fashion websites.

照片由该杂志资深主编卡琳·洛菲德(Carine Roitfeld)设计拍摄，如今随着这一话题通过网上论坛和流行风尚网站的传播，已引起公愤。

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Another scenario where this may be useful is if the messages in a group are spread over a long period of time.

此机制的另一个可用场景为组中的消息分散在很长的时间内进行传递。

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And there are ways to spread that out over a long period of time.

CNN: Giuliani's responses at the CNN/YouTube debate

Both the New York Times and the Wall Street Journal are reporting that Apple is working on a watch-like device. iWatch has been in the rumor mill for a long time, but now the rumor has gained more credibility being spread by these august outlets.

FORBES: Features That Would Make iWatch A Killer Product

"For too long we have been trying to to cover rotas of doctors which spread the time and attention of these key doctors too thinly, " he said.

BBC: Health minister statement