“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	ultravacuum ultraviolation ultra-violet ultraviolet ultraviolet absorber Ultraviolet absorbing filter ultraviolet absorption detector ultraviolet absorption spectrum ultraviolet and visible spectrophotometer ultraviolet astronomy Ultraviolet Astronomy Satellite ultraviolet attitude detector ultraviolet background ultraviolet band ultraviolet-bright star ultraviolet camera ultra violet catastrophe ultra-violet catastrophe ultraviolet catastrophe ultraviolet catastrophe, Rayleigh-Jeans catastrophe ultraviolet cell ultraviolet color ultraviolet communication，UVC ultraviolet continuum ultraviolet counterpart

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