吸烟是造成不必要疾病和死亡的最大原因。
Smoking is the biggest preventable cause of death and disease.
因患肺癌而死亡者，约90%是吸烟所致。
Cigarette smoking is responsible for about 90% of deaths from lung cancer.
聪明的人更长寿——这之间的关联程度就像吸烟与过早死亡一样强烈。
Intelligent people live longer-the correlation is as strong as that between smoking and premature death.
肥胖是造成美国人可预防性过早死亡的第二大原因，名列吸烟之后。
Obesity is the second cause of preventable premature death in America, after smoking.
90%肺癌引发的死亡都是由于吸烟所致。
Cigarette smoking is responsible for about 90% of deaths form lung cancer.
在美国吸烟是导致死亡的主要因素。
每四个烟民中就有一人可能因吸烟而死亡。
The chance is that one smoker in four will die from smoking.
与吸烟、高血压、心脏病相比，体质差导致死亡的危险更大。
Poor physical fitness is a better predictor of death than smoking, hypertension and heart disease.
不会有人因吸烟造成肺癌而死亡。
如此高的死亡率使得研究吸烟的致癌机理变得十分重要。
With high death rates like these, it's worth researching what the effects really are.
没有科学证据证明吸烟和死亡的相关性。
There is no scientific evidence of the correlation between smoking and death.
没有科学证据说明吸烟和死亡之间的相关性。
A there was no scientific evidence of the correlation between smoking and death.
吸烟能够引起慢性疼痛性死亡。
研究人员发现，2004年共有超过60万不吸烟者死亡。
Researchers found that more than six hundred thousand non-smokers died in two thousand four.
研究人员发现，2004年共有超过60万不吸烟者死亡。
Researchers found that more than six hundred thousand non-smokers died in two thousand four.
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