people don't change, people just get older and die. 这就是cohort replacement的铁律。希望在年轻人，一个学科要有未来，要赢得年轻人。
发布于 中国
周羿_Demog
people don't change, people just get older and die. 这就是cohort replacement的铁律。希望在年轻人，一个学科要有未来，要赢得年轻人。