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。

youdao

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。

youdao

Kelly couldn't focus his eyes well enough to tell if the figure was male or female.

凯利无法看清那个人影是男的还是女的。

《柯林斯英汉双解大词典》

And it has to do with climate, it has to do with sex ratio--male to female it has to do with diet, and it has to do with movement.

它与风气有关,也与性别比例有关,男性相对于女性的人数,还与饮食有关,与迁移有关

耶鲁公开课 - 美国内战与重建课程节选

Also included is funding for 4.7 million voluntary male circumcisions in eastern and southern Africa, which research has shown reduces the risk of female-to-male transmission by more than 60%.

BBC: World Aids Day: Obama in $50m Aids funding boost

Only about 20% of male-to-female transgender people have had genital reconstruction surgery, and only about 5% of female-to-male, estimates Walter Bockting, a psychologist at the University of Minnesota medical school who has 20 years of clinical experience working with transgender patients.

BBC: Transgender Americans take on New York

And because I felt like, first of all, there were already like male-bashing female rappers out there, and I didn't need to become the next male-bashing female rapper.

NPR: Queen Latifah on 'Trav'lin' Light'