他们比其他人吸更多的烟，对饮食和锻炼也不甚注意。
They smoked as much or more than others and were no better about diet or exercise.
有这种基因的吸烟者会吸更少的烟，因为他们不会不断地需要更多的尼古丁。
Smokers with this gene usually end up smoking many fewer cigarettes, because they don "t constantly need more nicotine."
有这种基因的吸烟者会吸更少的烟，因为他们不会不断地需要更多的尼古丁。
Smokers with this gene usually end up smoking many fewer cigarettes, because they don "t constantly need more nicotine."
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