“第五代人”年龄段划定rrrrrrrrrn代际更换与文化进化的一般机理rrrrrrrrrn代际更换与文化进化的特殊机理rrrrrrrrrn“第五代人”:尚在塑造中的群体 “The Fifth Generation” defines the age group r r r r r r r r nGeneral Mechanism of Intergenerational Replacement and Cultural Evolution r r r r n The special mechanism of intergenerational change and cultural evolution “r r r r r r r r r n” The Fifth Generation " group