When a person is healthy - he says «I do not know» in only one case - when is is really something he does not know or he is unaware that he knows it.

当一个人处于健康的状态时——他只在一种情况下说«我不知道»——当他真的不知道或者他没有意识到他知道的时候。

youdao

I doubt you could ever make yourself into a completely universal person, if only because you can only travel in one direction in time.

百分之百的无所不知恐怕是不可能的，至少，你只能往一个方向作时间上的旅行。

youdao

So often I see only one person trying to make their relationship work.

通常我只看到一方设法改善关系。

youdao

and I enjoy, like, solving proofs or, like, solving problems, but it's only one part of like, what I do, like as a person.

做证明题或者解决问题对我来说是一种享受，但这只是我生活的一部分而已。

都是天才 - SpeakingMax英语口语达人

If I'm the only one around today who's got Shelly Kagan's personality, then I'm the same person as the person who was lecturing to you on Tuesday.

假如我是今天这里唯一拥有Shelly，Kagan人格的人，那么我就跟星期二给你们讲课的人是同一人。

耶鲁公开课 - 死亡课程节选

And, of course, I'm only one person but I think it's quite - I think it's overwhelmingly likely he would have reached the 75 percent required had none of this ever happened.

NPR: Ripken Enters MLB Hall of Fame, McGwire Snubbed

And I only had one person complain.

NPR: At Chez Panisse, It's Time for Tap Water

In the case of my friends, at least, I only know maybe one person who is vocally upset at From for the drawbacks that have come up over time.

FORBES: Connect