population reproduction

基本解释

Information Material production and the population reproduction, are the human social existence and the nature of the development.
物質資料的生産和人口本身的再生産，是人類社會存在和發展的本質。
An important part of social modernization, the modernization of population involves modernization in population reproduction, population quality and population structure.
人口現代化是現代化的重要組成部分。人口現代化主要包括人口再生産類型現代化、人口素質現代化和人口結搆現代化。
Owing to the history of population reproduction & practice of strict control of its growth rate, the abject number of old people is large and the speed of population aging is rapid.
由於人口再生産的歷史和大力控制人口過速增長的實踐，中國老年人口的絕對量和人口老齡化的速度在世界上是首儅其沖的。

Perhaps more technically, the family lines that focused on something other than reproduction died out as a fraction of the population.
FORBES: Lemin Wu, Economic Growth and Why Humanity Can't Have Nice Things