If smokers gave up the habit soon after the start of the study, their risk of COPD dropped. None of the smokers who quit developed severe COPD.

如果吸烟者在研究开始后不久戒烟，患COPD的风险会降低。戒烟的人没有患严重的COPD。

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In most North American homes, if you are a guest, and the hosts are not smokers, you should not smoke in their house.

在大多数北美人的家里，如果你是客人，而主人又不吸烟，你就不应该在他们家里吸烟。

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If smoking is really as harmful as doctors say, it is time for smokers to think about it and try to give it up!

如果吸烟真的像医生说的那样有害，那么吸烟者是时候考虑一下戒烟了！

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Now a growing number of companies and hospitals will not hire smokers,or worse, will fire them if they are caught lighting up.

VOA: standard.2010.02.18

If you run these curves only on non-smokers you get rid of that J at the end of the curve and you get pretty much a function that's to the right of the curve here.

如果仅在不吸烟人群中做统计,那么左末端就不会出现J形曲线,而是会得到一条,从左到右逐渐上升的完美的函数曲线

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

If smokers really were deterred by higher taxes, the loss of revenues would cause severe withdrawal symptoms in many national treasuries.

ECONOMIST: Ups and downs for Big Tobacco

Smoke travels upwards, and if smokers are confined to the top level and adequate ventilation is in place (be it an open window or a small fan), then there can be no cause for concern to those non-smokers who sit downstairs.

BBC: TRAPPED BY INCONSIDERATE SMOKERS

Steve Humphries, British Heart Foundation professor of cardiovascular genetics at UCL, said: "Men who carried the E4 type are at higher risk of heart disease, but only if they are smokers".

BBC: Gene linked to heart disease risk