“老年人口系数”的概念、定义、翻译、参考文献-科学参考

单词	老年人口系数
释义	老年人口系数 Encyclopedia 医学老年流行病学释 coefficient of aged population老年人口系数老年人口在某个国家或某个地区的总人口构成中所占的比例。又称老年人口比例。
随便看	time-spatial system time splitting time-splitting method time-splitting scheme timestamp timestamp examination timestamp investigation timestamp ordering time standard time star time step time-stepping method time stepping scheme time switch technology time synchronism time synchronization time system timetable problem timetables of sunrise，sunset，moonrise and moonset Tim Etchells time-temperature equivalence principle time temperature equivalent principle time-temperature equivalent principle time-temperature index time-temperature-stress equivalence principle

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。