We've distinguished three different views as to the secret or key to personal identity across time.

我们陆续已经辨别了三种不同的,关于个人认同感关键的理论观点。

耶鲁公开课 - 死亡课程节选

Now, at the core of behaviorism are three extremely radical and interesting views.

言归正传，行为主义的核心,由三个非常极端又很有趣的观点组成。

耶鲁公开课 - 心理学导论课程节选