“成年型人口”的概念、定义、翻译、参考文献-科学参考

单词	成年型人口
释义	成年型人口 Encyclopedia 法学成年型人口释 adult population成年型人口 0～14岁人口数量占总人口数量30%～40%，65岁及以上人口数量高于总人口数量4%但低于总人口数量7%的人口年龄结构。
随便看	preset preset aperture ring preset diaphragm presetting presheaf presheaf of abelian groups presheaf of groups presheaf of sets presheaf structure preshoot preshot pre-shrinking preshrunk Presidential-Libraries Presidential Records Act president of the People's Republic of China president-responsibility system under the leadership of Chinese Communist Party Committee Presidents Cup presidium of the National People's Congress presious metal nanomaterials pre-slotted liner presoak presoaking presolar grains presolar matter

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。