It is a declaration of absolute interdependency among the things that we understand in binary terms but that we take somehow one to be causative of the other when we think about them.

这是在宣布事物之间的绝对的相互性,我们能在二元关系上理解这些事,但是我们惯常于把一个是当成另一个的原因。

耶鲁公开课 - 文学理论导论课程节选

There's a duality of people.

人类具有二元性

耶鲁公开课 - 心理学导论课程节选