Among advancer 's actions after responder 's negative double : a redouble shows strength .
如果应叫者否定性加倍,则回答人的行动为:回答人可以再加倍表示力量。
From the traditional perspective , the postgraduates of pedagogy either engage professional teaching , or do educational research , or undertake educational administration task . They are not only the advancer of educational practice but also the innovator of educational theory .