hierarchy

剑桥词典

a system in which people or things are arranged according to their importance
等級制度
Some monkeys have a very complex social hierarchy. 有些猴群中出現了非常複襍的種群等級。
He rose quickly through the political hierarchy to become party leader . 他的政治地位迅速上陞，成了黨的領導人。

the people in the upper levels of an organization who control it
統治集團 返回 hierarchy