It's just a placeholder that says I don't yet know what I wanna put here but I wanna put something, let me get back to you in just a moment.

它只是一个占位符，告诉电脑,我想在这放一个东西，但是暂时还不知道放什么东西，我先打断一下。

哈佛公开课 - 计算机科学课程节选

I don't know if that's true. I haven't been to enough cities outside of the United States.

我不知道这是不是事实。我去过美国以外的地方还很少，不能妄下定论。

纽约的人们 - SpeakingMax英语口语达人

I didn't know what else to do, and I read one book that really influenced me.

我当时不知道还能干什么,所以就读了本对我影响深远书

耶鲁公开课 - 1871年后的法国课程节选

Though at that time I didn't realize it was going to last 16 years or longer.

我还不知道它能用,16年以上。

耶鲁公开课 - 死亡课程节选

Well, I don't know yet and although, yes, I do in this story.

嗯，但是我暂时还不知道，是的，在这里。

哈佛公开课 - 计算机科学课程节选

Please don't anybody tell me late - any time after today you didn't know when the mid-term was and therefore it clashes with 17 different things.

所以以后千万别跟我说,你不知道什么时候期中考试,然后还在考试那天安排大一堆事儿去做

耶鲁公开课 - 博弈论课程节选

One of them was Bear Stearns so I don't know whether they're still on the list maybe they are maybe they're not; we might be down to nineteen.

其中一家是贝尔斯登，所以我不知道,它是否还在那名单上,也许在，也许不在了；,所以我们也许可以说名单上有十九家。

耶鲁公开课 - 金融市场课程节选

I don't have the definition of force yet."

我还不知道力的定义是什么"

耶鲁公开课 - 基础物理课程节选

Yeah, I don't know really what else to say. Just he's awesome.

我真不知道还能说些什么。总之就是他太棒了。

喜欢的电视节目 - SpeakingMax英语口语达人

V2 And there's going to be some volume V2 and some volume V1, but are not necessarily the same. Especially since the pressures are different. we don't know yet about temperature so I don't know what to say about these volumes because I don't know what the temperatures' are going to do.

这里的体积会变成2,这里的容积是V1，它们不必相等,尤其是当压力不相等的时候,我们还不知道温度,所以我不能说这里的容积,是多少因为我不知道,温度会怎样变化。

麻省理工公开课 - 热力学与动力学课程节选

So when you're seven you think, "I don't know.

你还小,所以你说,我不知道

耶鲁公开课 - 死亡课程节选