age pyramid meaning in Chinese

年龄塔
年龄锥体（年龄金字塔）

The most before all others in this part by analyzing natural changes condition of the shandong total population , the change of population age composition type , development of population age pyramid and old age at age to foster the detailed analysis of coefficient change , and unfolds before one ' s eyes a course of aging development of shandong population , then four protruding characteristics of aging development of shandong population are summed up out on this foundation : population aging speed is fast ; district difference is clear , urban and rural difference is notable ; the population age structure in " gold particular period " of population and at the initial stage of population aging
然后分析了世界和中国人口老龄化的发展特点及趋势，为后文对山东省人口老龄化的分析奠定理论和实践基础。第二部分：山东省人口老龄化进程分析。此部分中首先通过对山东省总人口自然变动、人口年龄构成类型变化、人口年龄金字塔演变和老年抚养系数变化的详细分析，展现出山东省人口老龄化发展的过程，在此基础上总结出山东省人口老龄化发展的四个突出特点：老龄化速度快；地区差异明显；城乡差异显著；正处于人口老龄化初期和人口年龄结构的“黄金时期” 。