“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	microstatistics microstoning microstrain micro strip micro-strip microstrip antenna microstrip gas chamber microstrip lines microstrobilus microstructural functional fluid microstructure microstructure analysis microstructure analysis of building material micro-structured mass transfer equipment microstructured vertical cavity surface emitting laser microstructure light emitting diode chip microstructure of a dictionary microstructure of ceramics microstructure of crude drug microstructure of iron and steel microstructure of macromolecular chains microstructure of superalloy microstructures microstructure simulation microstructures of plastically worked metals

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