那些在研究开始后一个月内就开始吸烟的人在研究结束时抑郁的可能性是那些没有开始吸烟的人的四倍。

Those who began smoking within a month of the study's start were four times as likely to be depressed at the study's end than those who did not begin smoking.

youdao

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。

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.

youdao

有些人很小就开始吸烟，因为他们的父母也吸烟。

Some people start smoking at a young age because their parents smoke.

youdao

So, if you're looking for another reason to quit, if you're looking for a reason not to start smoking, here's another good one.

因此，如果你正在寻找戒烟的另一个理由，如果你正在寻找一个不开始吸烟的理由，这就是很好的一个。

麻省理工公开课 - 化学原理课程节选

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