To determine whether in countries with high gender empowerment the female-to-male smoking prevalence ratio is also higher.
旨在确定女性性别权利高的国家里，女性对男性吸烟比率是否接近1。
2
The study estimated that men smoke nearly five times as much as women worldwide, but the ratios of female-to-male smoking prevalence rates vary dramatically.
该研究估计，全世界男性吸烟人数几乎是女性吸烟人数的五倍，但各个国家的男女吸烟人数的比率却相差甚大。
3
Kelly couldn't focus his eyes well enough to tell if the figure was male or female.