The polity is the regime that represents for Aristotle a mixture of the principles of oligarchy and democracy.

政体对亚里士多德而言,即是代表,寡头与民主原则混合的政权。

耶鲁公开课 - 政治哲学导论课程节选

Either what is established after the tyranny is an oligarchy, but notice I didn't say an aristocracy.

僭主统治之后要么是,寡头统治,注意下我可没说贵族统治

耶鲁公开课 - 古希腊历史简介课程节选