Researchers took a group of teenagers who had never smoked and for one year tracked whether they took up smoking and how their mental health changed.

研究人员找来一组从不吸烟的青少年，用一年的时间追踪他们是否开始吸烟以及他们的心理健康如何变化。

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Boulder was one of the first cities in the nation to enforce a ban on smoking.

博尔德是该国率先施行禁烟令的城市之一。

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The ban—one of the strictest in Europe—outlaws smoking in all bars and restaurants.

该禁令是欧洲最严厉的禁令之一，禁止在所有酒吧和餐馆吸烟。

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The report says one reason for the growing deadliness of cancer is more people smoking cigarettes in developing countries.

VOA: special.2009.01.13

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。

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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

The MPAA's position doesn't go far enough to address the seriousness of smoking among young people, says Fiore, noting that a U.S. Surgeon General's report published in March concluded that smoking in movies is one of the causes of youth smoking.

CNN: Should smoking trigger an R rating?

This is not one of the smoking guns that Mr. Goodell had previously been sitting on.

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Of the 3, 140 films that received a rating between May 2007 and March 2011, 54% contained at least one instance of smoking, according to MPAA statistics.

CNN: Should smoking trigger an R rating?