And the other thing to point out, which I don't know if this is true or not, but does anyone know -- well that's part's true, does anyone know what the atomic mass of lithium is?

另外需要指出的一点是，关于这点我不知道是不是真的，有人知道--这部分是真的，有人知道锂的原子量吗？

麻省理工公开课 - 化学原理课程节选

Yeah, I, to be honest, I'm not sure that's so true. Um...

是，我，实话说，我不知道这是不是真的。呃…

对于赞助入学的看法 - SpeakingMax英语口语达人

I was curious; I was even a user assistant at the time, I was certainly a geek at the time and yet I had no sense really of what actually went on in a classroom like this.

我很好奇，在当时我是一名助教，那时我肯定是一个怪胎,我真的不知道,这样的课上讲的是什么东西。

哈佛公开课 - 计算机科学课程节选

Yes, it's 7. So, I don't know if this is true or not, but I wonder if that's where the actual name 7-Up came from.

对，是七，我不知道这是不是真的，但是我怀疑这才是,七喜名字的真正来源。

麻省理工公开课 - 化学原理课程节选

And he--she said to me, "That's when I knew he really loved me."

他对我说，，“那时，我才知道他是真的爱我“

耶鲁公开课 - 心理学导论课程节选

Right.-And this is real.

我知道-这确实是真的。

普林斯顿公开课 - 人性课程节选

But I know this to be true.

但我知道这是真的。

哈佛公开课 - 幸福课课程节选

Now many of you may have heard, many of you may know, and if you don't already know this, I should warn you, that I have a reputation around Yale as being a harsh grader.

你们中的大多数可能听说过，你们中的一部分可能知道，如果你真的不知道，那么我要警告你，我在耶鲁,是出了名的严厉。

耶鲁公开课 - 死亡课程节选