"He's been down there to my knowledge twice, but I don't think he's really done that much."

VOA: standard.2010.06.10

I should say, to my knowledge, we know nothing more about Glaucon and Adeimantus from history, but Plato put them into his dialogue.

我必需说的是，就我所知Glaucon，和，Adeimantus，两人,仅是历史中的两个角色，但柏拉图将他们放入他的对话录。

耶鲁公开课 - 政治哲学导论课程节选