In the United States, smoking rates are down from the past, but cigarettes still cause about one-fifth of all deaths.

VOA: special.2009.05.27

Unless, of course, you're a smoker, or you're thinking of becoming a smoker, and then maybe you should worry, because this is one of the advertisements that was airing in terms of anti-smoking campaign.

除非，当然，你吸烟的话，或者你正考虑开始吸烟，那么你可能就需要担心了，因为这是反吸烟运动的,宣传内容之一。

麻省理工公开课 - 化学原理课程节选

They found that smoking increased the risk of Alzheimers developing by one and seven-tenths percent.

VOA: special.2010.03.09