Participants: Former and current nuclear weapons workers, 45 years old, including smokers and never-smokers, with variable exposure to occupational lung carcinogens.

参与者：农民和在职的核武器工人，45岁，包括有吸烟史与无吸烟史，并且有职业性的肺致癌物的接触史。

youdao

RESULT 1)72.00% of the smokers began to smoking when they were 15 ~ 25years old.

结果（1）开始吸烟者年龄主要集中在15～25岁，占总调查人数的72.00%；

youdao

Another 40 workers with no exposure to dust or toxicants were selected as controls. 12 male smokers were 31.8 yr old on average; 8 male non - smokers 32. 3 yr old on average;

另选劳动强度相似、不接触尘、毒的机加工工人40名作为对照，其中男吸烟工人12名，平均年龄31.8岁，男不吸烟工人8名，平均年龄32.3岁；

youdao

The FDA says 17-year-old smokers are three times as likely to use flavored cigarettes as smokers over the age of 25.

WSJ: NY Cancer Society says sweet smokes aimed at kids

The suit cites a secret industry study that surveyed smokers from 12 to 20 years old, even though many of those surveyed are not legally allowed to smoke.

ECONOMIST: Big Tobacco cut down to size, yet again | The

The poor fellows left commanding the old economy are ... nice guys, church deacons, pipe smokers, Wednesday-afternoon golfers, worsted clubmen and hearty backslappers.

FORBES: Digital Rules