sex ratio

常見例句

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.
它與風(fēng)氣有關(guān),也與性別比例有關(guān),男性相對(duì)於女性的人數(shù),還與飲食有關(guān),與遷移有關(guān)
耶魯公開課 - 美國(guó)內(nèi)戰(zhàn)與重建課程節(jié)選

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