Since World War ii, colleges and universities, above all low-cost state schools, have acted as social escalators lifting millions of poor, immigrant and working-class young people into the middle class. 自二战以后,大学与学院,尤其是低收费的州立大学,一直起着社会催化剂的作用,将数百万穷人、移民和劳动阶级的子弟提升到了中产阶级。
Under the dual structure, the immigrant workers as the product of urbanization and industrialization, this new labor force has imported a new part of the industrial working class. 农民工作为城乡二元结构下,城镇化和工业化发展的产物,这支新型劳动大军,已经汇入了中国新产业工人阶层。