“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	weakener weak energy condition weakengineering in landscape architechture weakening weakening coefficient weakening efficiency of end socket weakening method weak epimorphism weak equivalence weak equivalence principle weak equivalence relation weaker condition weaker convergence weaker form weaker formula weaker method weaker metric weaker norm weaker theory weaker topology weaker uniformity weakest precondition weakest topology weakest uniformity weak extension

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