Robert Fulton would say for the rest of his life that he had no idea why he said such a thing.

VOA: special.2009.01.14

In fact, I do this as well, I mean I have water with me and I have no idea why because I'm not particularly dehydrated.

事实上,我也整天带着水壶,我是说我随身带水,但又不知道为什么要带,因为我并没有特别的脱水症状

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

This is the strongest memory I have, and I remembered a) that I didn't learn them, and that was really bad because it kept coming up, but the other thing I remember is that I had no idea why they were important. I didn't really understand what any of these molecules were.

这就是我最深刻的记忆，我记得我并没有学好，这十分不好，因为之后它们总是不断出现,但另外的事情我记得,是我完全没有概念为什么。

麻省理工公开课 - 化学原理课程节选

No idea why he wanted to study saliva, but he then discovered something.

他研究唾液分泌的初衷我们不得而知，但他却因为这个研究而有所发现。

耶鲁公开课 - 心理学导论课程节选

Kaj, the head TA is Scandinavian so I've got no idea why he's supporting Liverpool anyway, but I think maybe he spells it like this or something like this.

主助教卡茄是斯堪的纳维亚人,我也很好奇为什么他要支持利物浦队,不过我猜大概他大概这么拼写利物浦

耶鲁公开课 - 博弈论课程节选

Why they never quite sat down and standardized all this, I have no idea.

我不理解为什么当时人们不统一规格

耶鲁公开课 - 美国内战与重建课程节选