将近十分之一母亲称她们在整个孕期内都大量吸烟，另外有12.5%被调查者表示她们在此期间曾少量吸烟，而12.4%的人则称她们在怀孕期间停止吸烟。
Almost one in 10 of the mothers said they smoked heavily throughout their pregnancy; a further 12.5% said they smoked lightly during this period, and 12.4% said they stopped smoking while pregnant.
吸烟的减少量可明显地反映代偿性吸烟程度，即吸烟量减少越多，代偿越大。
The amount of smoking reduction was shown to be a strong predictor of compensatory smoking, with greater cigarette reduction associated with more compensation.
一项研究显示，饮食或补品中少量的铁和钙，可能在肺癌形成过程中扮演着重要角色，吸烟者的例子更是明显。
Small amounts of iron and calcium in the diet or in the form of supplements may play an important role in the development of lung cancer, especially among smokers, a study suggests.
偶尔吸烟者也许认为一周吸少量香烟是“没有什么了不起的”。
Casual smokers may think that smoking a few cigarettes a week is "no big deal."
偶尔吸烟者也许认为一周吸少量香烟是“没有什么了不起的”。
Casual smokers may think that smoking a few cigarettes a week is "no big deal."
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