How risky is secondhand smoke?
二手烟到底有多危险？
No secondhand smoke production.
无二手烟的产生。
How can secondhand smoke be avoided?
该如何避免吸入二手烟？
避免吸二手烟。
Don't put up with secondhand smoke.
绝对不要容忍被动吸烟。
Will secondhand smoke affect our ears?
二手烟会影响我们的耳朵吗？
This smoke is called secondhand smoke.
这种烟叫做二手烟。
Secondhand smoke is a big health hazard.
吸二手烟对健康的危害很大。
Stop smoking and avoid secondhand smoke.
停止吸烟和避免消极吸烟。
Secondhand smoke tied to kids' poor mental health.
儿童吸二手烟易导致心理亚健康。
People are now aware of the danger of secondhand smoke.
人们现在意识到二手烟的危害。
How many carcinogens have been found in secondhand smoke?
二手烟中发现了多少种致癌物质？
There is no risk-free level of exposure to secondhand smoke.
没有风险的二手烟含量是不存在的。
It's been scientifically proven that secondhand smoke is dangerous.
科学已经证实抽二手烟是十分危险的。
So Repace is correct that secondhand smoke has been studied outdoors.
所以Repace在户外做的二手烟研究是对的。
Because secondhand smoke is very harmful, especially for children.
二手烟会危害人体健康，特别是对抵抗力弱的小孩子。
It is not yet clear how secondhand smoke would trigger mental troubles.
二手烟如何能引起精神疾病还不清楚。
In recent years, secondhand smoke has emerged as a public health threat.
近些年来，被动吸烟逐渐成为了一个公共健康的威胁。
High concentrations of many of these chemicals are found in secondhand smoke.
研究发现二手烟中含有高浓度的上述有害物质。
One US study found evidence of secondhand smoke in 60 percent of non-smokers.
一项美国的研究也发现了一些证据证明，二手烟吸烟者占不吸烟者人数的60%。
Children were most likely to breathe secondhand smoke in their own homes.
孩子们最有可能在自己家中吸到二手烟。
It took years to prove that secondhand smoke was hazardous for your health.
它花了几年证明，二手烟是有害你的健康。
But let's not cloud that debate by invoking the general harm of secondhand smoke.
但是我们不要以二手烟的一般危害来使这个辩论含糊不清。
Secondhand smoke increases the risk of heart attack and other heart problems.
接触二手烟会增加心脏病发作的几率，还可能引发其他相关疾病。
You don't smoke because you understand the dangers - but what about secondhand smoke?
你不吸烟正因为你知道吸烟的危害——但你知道二手烟吗？
Exposure to secondhand smoke during pregnancy increases the risk of low birth weight.
怀孕期间受二手烟影响会增加低出生体重的几率。
The surgeon general says there is no safe level of exposure to secondhand smoke.
外科主治医生说没有对揭漏的被动吸烟的安全级别定论。
And secondhand smoke has been shown to make respiratory conditions, such as asthma, worse.
二手烟还会加重呼吸系统疾病，例如加重哮喘。
And secondhand smoke has been shown to make respiratory conditions, such as asthma, worse.
二手烟还会加重呼吸系统疾病，例如加重哮喘。
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