短語詞組短語inheritance E hierarchy 繼承層次Using an Inheritance Hierarchy 運(yùn)用繼承體系class inheritance hierarchy structure 類繼承層次結(jié)構(gòu)Depth Of Inheritance Hierarchy 繼承結(jié)構(gòu)深度collaboration -oriented inheritance with role hierarchy 面向協(xié)作的角色繼承 返回 inheritance hierarchy