The usage of the hierarchicalconstruction of knowledge source and the priority mechanism greatly improves the efficiency of reasoning and the capability of dealing with concurrent abnormal events.
It is crisis to have a rational knowledge and hierarchical structure and steady discipline echelon with higher academic level to make progress in discipline construction.
学科建设要取得进展，关键是要有一支知识和层次结构合理、有较高学术水平的稳定的学科梯队。
3
Ancient China as a feudal society honored strict hierarchical principles which found its expression also in the construction of Siheyuan.