They are linked together by four different colored segments indicated here not by colors now but by letters.

它们由四个不同颜色的片段连接,这里不是用颜色表示,是用字母表示

耶鲁公开课 - 生物医学工程探索课程节选

But I want to start with what is one of the grand themes of the Republic, it is indicated in Book II by Adeimantus' speech about self-control.

但我想从《理想国》中的,一个重要主题开场，在第，II，册,由，Adeimantus，关于自控的谈话中所引出。

耶鲁公开课 - 政治哲学导论课程节选