sex ratio是什么意思

作者:恒星英语学习网所属分类:S开头的英语单词

sex ratio 是什么意思

中文翻译与英英解释

	男女人口比例。

	sex: n. 1.性；(男女的)性别；〔集合词〕男性，女性。 2 ...
	ratio: n. (pl. ratios) 1.比，比率，比值；比例 ...

Sex ratio is the ratio of males to females in a population. The primary sex ratio is the ratio at the time of conception, secondary sex ratio is the ratio at time of birth, and tertiary sex ratio is the ratio of mature organisms.

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