Never smoke in a car with other people. Even exhaling out the window does little, if anything, to reduce smoke exposure.

绝不在有其他人在的时候在车厢里抽烟。 假如实在想抽点，到车窗外去抽，好让烟雾扩散远去。

youdao

True, there is evidence that being near someone smoking, even outdoors, can result in significant secondhand smoke exposure.

诚然，有证据表明，待在吸烟者身旁，即便是在室外，也算接触到了二手烟。

youdao

The decline is secondhand smoke exposure was not as dramatic in black nonsomkers as it was in whites and Mexican-Americans.

二手烟吸入下降在黑人非吸烟人群中的显示并不像它在白人非吸烟人群及墨西哥-美国人非吸烟人群中那样明显。

youdao

But clearly there is no such thing as a safe level of cigarette smoke exposure.

VOA: special.2009.06.03

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

So in other words, if you live with a smoker, you really are at very high risk of demonstrating high levels of second-hand smoke exposure."

VOA: standard.2010.06.15

Secondhand smoke exposure causes eye irritation, asthma and other acute respiratory diseases and is thought to be a cause of infant crib death.

CNN: Is secondhand smoke really that risky?

Children are also destined to long-term secondhand smoke exposure.

CNN: Is secondhand smoke really that risky?

Our approach was further justified by the fact that African-American smokers actually have lower cumulative smoke exposure compared to their white counterparts, since they smoke substantially fewer cigarettes per day on average and start smoking at a later age.

FORBES: Will Removing Menthol From Cigarettes Improve Health?