It's for-profit and the theory that we have in capitalist countries is that this is a good model.

这是盈利性公司,这是种滋生于资本主义国家的理论,也是个很好的模式

耶鲁公开课 - 金融市场课程节选

If you hope to make it with theory of what people are and how people work, you have to explain and talk about language.

如果你想要理解关于人类本质,及其行为模式的理论,就必须得探讨并解释语言

耶鲁公开课 - 心理学导论课程节选