And so, any adequate theory of language has to allow for both the commonalities and the differences across languages.

因此,任何完善的语言理论,都必须谈及不同语言间的共性和差异

耶鲁公开课 - 心理学导论课程节选

But these are important issues and these vary a lot from culture to culture and a good theory of psychology has to explain how these differences arise.

这些重要问题,在每个文化中都不一样,一个好的心理学理论必须能解释,这些差异是怎么产生的。

耶鲁公开课 - 心理学导论课程节选

The question of why a boy might prefer one sort of sticker, and you might get a different response with a girl, is going to come up later when we discuss different theories of sex differences.

至于为什么男孩偏爱一类贴纸,而女孩偏好另一类贴纸的问题,等稍后我们讨论两性差异的不同理论时,再进行解释

耶鲁公开课 - 心理学导论课程节选

And this is one of the questions which I'm going to deal with in the next couple of lectures but before I get to the theory of social psychology I want to talk about an individual difference.

而这其中一个问题就是,我会在这两节课里讲的,但首先我们来了解社会心理学的理论,我想讲一个个体差异。

耶鲁公开课 - 心理学导论课程节选