不知何故，那封信始终未寄到。

For some unaccountable reason, the letter never arrived.

《牛津词典》

我不知道那活儿你怎么受得了。

I don't know how you stick that job.

《牛津词典》

自从听到那消息，我一直茫然不知所措。

I've been in a complete daze since hearing the news.

《牛津词典》

Even if quantum mechanics was wrong and somehow, you know, at the macro level all the indeterminism boils out-- whatever-- and at the macro level we are deterministic systems, so what?

即便量子力学是错的,而且不知怎的,在宏观水平上,所有的非决定性都蒸发了,不管发生了什么,在宏观水平上我们都成了决定论的系统,那又如何

耶鲁公开课 - 死亡课程节选

This particular copy was pretty dog-eared; As a matter of fact, it was a paperback copy and I think it was in about eight or ten different pieces and the people that threw this party remembered that, so they gave me it at this celebration.

我用过的那本已经翻烂了,实际上,那是本平装版,我想书脊也不知断了八处还是十处,组织派对的人还记得,在派对上把这本书给了我作纪念

耶鲁公开课 - 金融市场课程节选