人口词汇表
population statisticspopulation pyramidpopulation qualitypopulation densitypopulation distributionpopulation basepopulation decreasepopulation increasepopulation reproductionrural populationurban populationpopulation waiting for employmentworking populationunderpopulationoverpopulationneo-MalthusianismMalthusianismpopulation theorydemographerdemographypopulation studies