demographers的例句（demographers在句子中的用法）

• Demographers talk about a " low - fertility trap " 人口学家称之为 “ 低生育陷阱 ”
• In the public's eyes , demographers have a checkered reputation. 民众对人口统计学者的评价不一.
• 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.