Of course, the division of population age structure is comparative, but not invariable.
当然，对人口年龄结构的划分是相对的，而不是一成不变的。
Simply introduce the concepts of the population age structure.
简单介绍有关人口年龄结构的相关概念。
The paper analyzes the economic effect in the light of the characteristics of the change in population age structure of Gansu province.
本文针对甘肃省人口年龄结构变动特点，分析其经济效应。
The paper analyzes the economic effect in the light of the characteristics of the change in population age structure of Gansu province.
本文针对甘肃省人口年龄结构变动特点，分析其经济效应。
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