“sex ratio at birth”的概念、定义、翻译、参考文献-科学参考

单词	sex ratio at birth
释义	sex ratio at birth Encyclopedia 法学生育率释 sex ratio at birth出生性别比在特定的时间和空间范围内出生时的活产男婴数与活产女婴数之比。又称出生人口性别比、第一性别比。
随便看	resource planning resource planning management Resource Policy resource pool resource portfolio allocation resource production scheduling resource property right price resource property rights allocation resource protectionism resource purchasing resource ratio hypothesis resource record resource recycling resource regeneration resource register resource registration resource reservation resource reservation protocol resource reservation protocol, RSVP resource reuse technology resource risk warning Resources resources and services register resources and services registration system resource saving and environmental friendly society

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