男女人口比例;

And they find that households with sons save more in high male-to-female sex ratio regions.
他们还发现,在男女性别比失衡的地区,有儿子家庭的储蓄率会更高些.
来源:互联网摘选The idea of diet influencing sex ratio is already part of traditional wisdom.
饮食影响孩子性别的观点其实早已有之.
来源:互联网摘选From 26℃ to 36℃, the sex ratio of female to male changed markedly as the temperature increased.
雄性比例,在26℃~36℃范围内随着温度上升而增大,至36℃时, 两种群成虫均为雄性.
来源:互联网摘选The study on the sex preference address the origin of the sex ratio disequilibrium.
性别偏好的研究,源于出生人口性别比的异常.
来源:网络文摘精选These problems include the high sex ratio and the growing population aging.
例如出生人口性别比偏高、人口老龄化等.
来源:汉英非文学 - 白皮书The difference of sex ratio between nature pregnancy and this study is unremarkable.
三组之间婴儿性别比例不存在差异.
来源:互联网摘选The newborn sex ratio for local people is 100:107 which is within the normal international range.
上海当地的新生儿男女比例为100:107,这个还是处在国际平均线之内的.
来源:互联网摘选Why the Approaches Dealing with the Sex Ratio Imbalance are Largely Ineffective?
治理出生人口性别比失衡问题为何成效甚微?
来源:互联网摘选We found no significant difference in the sex ratio between EWS and CS ( P > 0.05 )
实验增温灌丛样地与对照间性比的差异不显著 ( P>0.05 ).
来源:互联网摘选For the purpose of studying the relations of egg shape index to hatchability and sex ratio.
用单因子试验设计,探索了罗曼父母代种蛋蛋形指数与孵化率、性比例的关系.
来源:互联网摘选
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