If you have problems during those years of life, you could become an anal personality, according to Freud, And, according to Freud, literally, it meant you are unwilling to part with your own feces.

据弗洛伊德的理论,如果你在那几年里你出了问题，那么你就会形成肛门期人格，根据弗洛伊德的理论，这就表示，你不愿意排泄粪便。

耶鲁公开课 - 心理学导论课程节选

But that doesn't mean we couldn't revise it.

但那不表示我们不能修正这个理论。

耶鲁公开课 - 死亡课程节选