American scientists have added new research to the growing body of evidence on why pregnant women should not smoke-showing it can reduce their babys lung capacity.
越来越多的证据阐明孕了妇不应吸烟的原因，美国科学家对此问题又进行了一项新的研究证明，孕妇吸烟降低婴儿肺活量。
American scientists have added new research to the growing body of evidence on why pregnant women should not smoke-showing it can reduce their babys lung capacity.
越来越多的证据阐明孕了妇不应吸烟的原因，美国科学家对此问题又进行了一项新的研究证明，孕妇吸烟降低婴儿肺活量。
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