“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	theory of nucleosynthesis theory of numbers theory of numerations theory of nutrient returns theory of objective attribution theory of obstructions theory of oil gas formation theory of oil-gas formation theory of ominant structural plane theory of open and peaceful mind theory of opera conception theory of opera imagery theory of opera real-virtual interplay theory of operators theory of optical activity theory of ordinals theory of ordinary representations theory of organic decentralization theory of organizations theory of original evil of human nature theory of original goodness of human nature theory of origin of species theory of oscillations Theory of Painting theory of pangenesis

科学参考收录了854744条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。