demographers造句

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 " low - fertility trap "
人口学家称之为 “ 低生育陷阱 ”