“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	polyploidization of invasive species polyploid mutagenesis polyploid speciation polyploidy polyp of vocal cord polypolarity polyporate ceramic material polyporate metal materials polyporous polyporus poly (p-phenylene) poly(p-phenylene benzobisoxazole) fiber poly (p-phenylene oxide) poly (p-phenylene sulfide) poly-p-phenylene terephthalamide poly (p-phenylene terephthalate) poly-p-phenylene terephthamide fiber poly (p-phenylene vinylene) polyprenol polyprenol lipoids polypropylene polypropylene catalyst polypropylene cigarette filter tow poly (propylene exide) poly (propylene exide); polyoxypropylene

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