I am astounded at the comments made by the Chief Superintendent.主管的评语让我大吃一惊。He was stopped at the airport by an assistant superintendent of police.他在机场被一名助理警长扣留了。the superintendent of schools in Dallas达拉斯教育局长...
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...