1. Based on the theory of demology, the types of population age structure are divided according to the different proportions of elderly population and young population. 按人口学理论，人口年龄结构的类型是依据老年人口或未成年人口在人口中的不同比例来划分的。人口年龄结构类型分为年轻型、成年型和老年型。
2. Study on Development Strategy of Gansu Population, Study on the Situation of Population in Gansu, Publishing House of China Population, 2006. 《甘肃省人口发展战略研究》中编写《甘肃省人口省情研究》一章，中国人口出版社，2006年。
3. Study on Development Strategy of Gansu Population, Study on the Situation of Population in Gansu, Publishing House of China Population, 2006. 《甘肃省人口发展战略研究》中编写《甘肃省人口省情研究》一章，中国人口出版社，2006年。
4. Note:Data in 2000 were taken from population census, The permanent population of 2007 were taken from sample survey on population changing. 注：2000年常住人口为人口普查数据；2007年常住人口为人口变动抽样调查数据。
5. During the day it has a high population density, the night population decline, the number of days and nights to big changes in population; 白天它人口密度高，夜晚人口数量骤减，昼夜人口数量变化非常大；
网络释义
population boom population explosion 人口爆炸;
population boom population explosion 人口爆炸;
accessible population 可接近母群體;
可取得的母群体;
population distribution 人口分布;
总体分布;
粒子数分布;
城市人口分布;
