世界无烟日是为了提高人们对吸烟危害的认识。

World No Tobacco Day is to raise awareness about the dangers of smoking.

研究已经确认吸烟危害健康。

The research has confirmed that tobacco smoke presents a hazard to health.

卫生局长已测定吸烟危害健康.

The surgeon general had determined that cigarette smoking is dangerous to your health.

尽管吸烟危害健康, 但是年轻女性的吸烟频率依然高得不成比例.

Despite the health hazards, cigarette smoking is disproportionately frequent among young women.