Selectivity of human migration long been the focus of demographers and economists.人口迁移的选择性一直以来都是人口学家和经济学家关注的焦点.In the public's eyes , demographers have a checkered reputation.民众对人口统计学者的评价不一.Demographers talk about a...

demographers的音标：...

n.人口统计学( demography的名词复数 )...