“coefficient of aged population”的概念、定义、翻译、参考文献-科学参考

单词	coefficient of aged population
释义	coefficient of aged population 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。
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