N-UNCOUNT Secondhand smoke is tobacco smoke that people breathe in because other people around them are smoking. 二手烟 [美国英语]
...the first definitive evidence that secondhand smoke causes lung cancer.
...二手烟导致肺癌的第一条确凿的证据。
This is much like a non-smoker getting cancer from second-hand smoke, while the heavy smoker is fortunate enough to smoke in good health.
这很像一个不吸烟的人因为二手烟而得癌症，而烟瘾大的人即使吸烟也幸运地保持健康。
My brother got sick because of my second-hand smoke.
我的弟弟因为吸我的二手烟已经生病了。
Second-hand smoke causes 600 000 premature deaths per year.
二手烟雾每年导致60万人过早死亡。
To accurately assess the level of second-hand smoke exposure, researchers tested for cotinine, which is produced when nicotine is metabolized.
VOA: standard.2010.06.15
The most common cause of COPD is long-term smoking or years of exposure to second-hand smoke.
VOA: standard.2010.06.21
In recent years, medical evidence has pointed to the harmful physical effects of second-hand smoke.
VOA: standard.2010.06.15
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