At Huazhong University of Science and Technology the ratio of male to female engineers is about 7 to 1.

华中科技大学前身是华中理工大学，理工科男生和女生的比例最夸张的时候是7∶1。

youdao

The mean age at death was 70 years and the male-to-female ratio was 3.6:1.

死亡的平均年龄是70岁，男女比例为3.6：1。

youdao

Most people will be at about age 10 through a series of large and subtle change, the ratio of male to female one or two years later.

大都人会在10岁左右阅历一系列庞大而巧妙的改变，男性比女性晚一两年。

youdao

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

Today, MIT and other top institutions have a more balanced male to female student ratio as society and universities finally recognize that math, science, and engineering are not just for boys anymore.

FORBES: Green Tech: Finally, A Female-Friendly Engineering-Tech-Energy Field?

Chicago-based startup revolutionizes the way people go out at night by automatically tracking and revealing the number of people in a bar, the male-to-female ratio, and the average age of each customer, in real-time, with no need for user participation.

ENGADGET: SceneTap app analyzes pubs and clubs in real-time, probably won't score you a Jersey Shore cameo

Accessible for free via iPhone and Android applications or the Web, SceneTap lets users view information on the number of people, male-female ratio, and average age breakdown of patrons in their favorite venues across their city.

ENGADGET: SceneTap app analyzes pubs and clubs in real-time, probably won't score you a Jersey Shore cameo