birth ratio

基本解釋

The normal human birth ratio is 106 males for every 100 females.
正常的人類出生比例是每106個男性對應100個女性。
But since 1970, the U.S. and Japan have experienced a downward shift in this male-to-female birth ratio, researchers report in the online edition of the journal Environmental Health Perspectives.
但據(jù)研究人員在環(huán)境健康觀察期刊在線版上發(fā)表的報告顯示，從1970年開始，美國和日本的男女出生比率開始下降。
The book points out that the expanding male to female birth ratio will mainly affect China's marital and family structure and employment structure, as well as the "population's ecological security."
該書指出，出生性別比攀升主要是影響婚姻家庭結(jié)構(gòu)、就業(yè)結(jié)構(gòu)變遷和“人口生態(tài)安全”。
english.peopledaily.com.cn

China's skewed birth ratio (118 boys to every 100 girls) means that there will be a surplus of about 24m bachelors by 2020.
ECONOMIST: Singletons are getting some help finding a mate
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
India does, in fact, publish data (since 1999) on the sex ratio at birth.
ECONOMIST: Letters