“population aging level”的概念、定义、翻译、参考文献-科学参考

单词	population aging level
释义	population aging level Encyclopedia 工学公共服务设施规划释 population aging level老龄化水平即人口老龄化水平，用来衡量社会人口结构的重要参数。用地区老年人口数与总人口数之比值来表示。
随便看	Faisalabad Faisal Dynasty faithful faithful anti-representation faithful endomorphism faithful estimation faithful functor faithful group action faithful interpretation faithfully flat faithfully flat module faithfully flat morphism faithfully flat ring faithful module faithfulness faithfulness, expressiveness and elegance faithful positive linear functional Faithful Record of Manchu faithful * representation faithful *-representation faithful representation faithful ring faithful state faithful weight faith, hope and agapecharity

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。