There seems to be no interesting difference between how the brain comes to acquire and use the spoken language versus a sign language.

似乎大脑在如何获得和使用口语语言,与如何获得和使用手语之间,不存在任何的差别

耶鲁公开课 - 心理学导论课程节选

We're talking about a culture when we're talking about the Greeks, which is most strikingly signified by the language that is spoken.

当我们谈论希腊人时我们是谈论希腊文化,是严格以所使用的语言为主要标志的

耶鲁公开课 - 古希腊历史简介课程节选