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英国儿科医学专家研究发现,经常被动吸烟的儿童容易发生龋齿。这项研究显示,在2岁～5岁的儿童中,父母均不吸烟的儿童,患龋齿率仅为10%。但父母其中有一人吸烟的
British pediatricians study found that children often passive smoking tooth decay. The study showed that among children aged 2 to 5 years, children with no smoking parents had tooth decay rates of only 10%. But one of the parents smoked