There is something that you really have to ask, something that cannot wait.

有什么非问不可的问题，无法等待。

哈佛公开课 - 幸福课课程节选

because you push it all back to right when it has to do.

因为你把事情都推到非做不可的时候了。

主修古典文学 - SpeakingMax英语口语达人

It's a wonderful clarinet solo by someone named Johnny Dodds long dead of course- but it's one of the most beautiful, incredible clarinet solos you'll ever want to hear.

这是一段由强尼·多兹演奏的单簧管独奏,当然他去世很久了,但这是一段最美妙且无与伦比的,单簧管独奏,你非听不可

耶鲁公开课 - 聆听音乐课程节选

Why should we think there's some--Even though, normally, the barrier can be crossed and Xs can study the non-X, why should that barrier suddenly become un-crossable in the particular instance when we're dealing with Platonic forms?

为什么我们应该认为即使通常来说,那个界限是可以跨越的,即X可以研究非X,那为什么这个界限突然,在讨论柏拉图型相的时候,就变得不可逾越了呢

耶鲁公开课 - 死亡课程节选