The general word for that process of making differences between cells is differentiation.

一言以蔽之,细胞之间产生差异的过程称为分化

耶鲁公开课 - 生物医学工程探索课程节选

He speaks about the word polis more than once in the same general context.

赫西奥德在同一文章之中,不止一次谈到了城邦这个词

耶鲁公开课 - 古希腊历史简介课程节选