1951年有医学家发表文章，称吸烟会导致癌症。
Medical scientists has published the 1951 article, saying that smoking causes cancer.
吸烟会导致癌症，心脏病和许多其他疾病，因此，人们不应因为担心适当的增重而放弃戒烟。
Smoking causes cancer, heart attacks and a host of other ailments so worry about modest weight gain shouldn't deter someone from quitting.
很久以前科学就明确了吸烟会导致癌症，但是一项新研究显示儿童能从吸烟的父亲那里遗传这种基因损伤。
The science has long been clear that smoking causes cancer, but new research shows that children could inherit genetic damage from a father who smokes.
很久以前科学就明确了吸烟会导致癌症，但是一项新研究显示儿童能从吸烟的父亲那里遗传这种基因损伤。
The science has long been clear that smoking causes cancer, but new research shows that children could inherit genetic damage from a father who smokes.
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