戒烟期间，请勿饮酒。
果然，一、两个月之后，在这期间，没有任何人劝说她的父母，他们竟然戒烟了。
Sure enough, within a couple of months, without anyone saying a word to them, both parents quit smoking!
英国调查者称，一组基因可以解释为什么有些妇女发现在怀孕期间难于戒烟。
A gene can explain why some women find it more difficult to stop smoking during pregnancy, say UK researchers.
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