This was very big in an ad campaign at least last year, I'm not sure if it still is, with the little butterfly.

它的广告宣传做得很大，至少在去年是这样的，我不确定它现在还是不是，它这里有一个小蝴蝶。

麻省理工公开课 - 化学原理课程节选

Oh, I'm not sure what the word for this is."

噢，我都不确定我该用什么词来描述它了。”

紧张是学英语的敌人 - SpeakingMax英语口语达人

I'm not certain it's meaningful, unless you are in the habit of giving your furniture personal names.

我不确定它有意义，除非你们热衷于,给你们的家具起名字。

麻省理工公开课 - 计算机科学及编程导论课程节选

The other thing I wanted to mention and I'm not sure if the exhibit's still there.

另外一个我想要指出的事情就是,我不确定它是不是还在展出。

麻省理工公开课 - 化学原理课程节选

And since we are not expecting the mass of the particle to change, what we really are saying is the uncertainty in its velocity times the uncertainty in its position is greater than the ratio of the Planck constant divided by 2 pi.

因为我们不期望,粒子质量发生变化，我们说的是,它速度的不确定度,乘以它位置的不确定度,比普朗克常量,除以2除以圆周率要大。

麻省理工公开课 - 固态化学导论课程节选

Now I don't know if you can read it because it's a little blurry, but a diet program that's been successful over two thousand years; can't beat that kind of a track record.

我不确定你们能否读懂它,其内容有些模糊,但该减肥方案已有两千年的成功史,这个记录是难以打破的

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

What else? Strongly felt tonal key, which is called-- I don't know if I mentioned this or not-- the tonic key, the tonic pitch, the tonic pitch there, and this idea of the direction of the music.

还有什么,强烈感受到的主调,它叫什么来着,我不确定我是否已经提及到了,主调,主音高,包括了主音高,还有音乐走向的观点

耶鲁公开课 - 聆听音乐课程节选

FAO Schwarz is a big deal toy store here and I'm not sure if it's on Fifth Avenue, maybe...

AO Schwarz 玩具店是这边一个很大的玩具零售店，我不确定它是不是在第五大道，也许是吧……

小心超额消费 - SpeakingMax英语口语达人

I believe it's called Yogi Berra Park but I'm not sure about that.

我记得它叫Yogi Berra公园，但我也不太确定具体名称。

布朗克斯的景点 - SpeakingMax英语口语达人

And to just give you a sense of what this is, the analytical expression that Heisenberg gave in one of its forms is that the uncertainty in the momentum a particle times the uncertainty in its position, this is the uncertainty.

给你说明一下什么是，分析的表述方式,海森堡给出的按照它的其中一种形式,那就是,粒子动量的不确定度乘以,位置的不确定度，这是不确定关系。

麻省理工公开课 - 固态化学导论课程节选

So you can see that we're starting to have a very complicated equation, and it turns out that it's mathematically impossible to even solve the exact Schrodinger equation as we move up to higher numbers of electrons.

所有你们可以看到我们得到了,一个非常复杂的方程，结果是它在数学上是,不可能解出确定的,薛定谔方程,当我们考虑更高的电子数目的时候。

麻省理工公开课 - 化学原理课程节选

Why don't we define a new unit of energy That isnear to what we have to measure?

为什么我们不确定一个新的能量单位,它近似于我们需要测量的一些量？

麻省理工公开课 - 固态化学导论课程节选