sex ratio

常见例句

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

The sex ratio of 15-year-olds in 2005 was not far from the sex ratio at birth in 1990.
ECONOMIST: Gendercide
According to the most recent Washington Post poll, black voters continue to oppose same-sex marriage by a ratio of 55-45, viewing the subject as a religious issue rather than a matter of civil rights.
FORBES: Obama Support Of Gay Marriage An Act Of Political Courage Or Just Catching Up?
It shows the sex ratio at birth, whereas the census shows the ratio for children aged 0-6 (census figures for the sex ratio at birth have not been published).
ECONOMIST: Banyan