Indicate epidemiology investigation , confirm on the grounds of international sampling investigation, major part in the cancerogenic patient who has a smoke is a passive smoker.

病学调查表明，据国际性的样调查证实，吸烟致癌患者中的大部分是被动吸烟者。

This is the valuable new awareness I brought away from my externship, and I have now decided to apply for graduate programs in epidemiology and public health.

这就是我从那次见习所得到的宝贵的新知。现在我已决定申请读研究生院的病学及公共卫生专业。

A lot of epidemiology consider to discover, expose in more than 2 fine long hair gauss (electromagnetic wave unit of measurement) the person in magnetic field, meet with cancered risk is higher.

许病学研究都发现，暴露在超过2毫高斯（电磁波计量单位）磁场中的人，罹患癌症的风险就比较高。