If I charged the reactor in this manner, and of course I'm assuming 100% completion of the reaction which we know is overly optimistic.

如果我们这样来考虑这个反应的前提，就是我们假设,反应完全进行,我们知道这有些过于乐观了。

麻省理工公开课 - 固态化学导论课程节选

which I don't know if you guys are familiar with. It's like a rural state in the middle of America,

我不知道你们对那里熟不熟悉。
这是在美国中部的一个以乡村为主的州。

来自爱荷华 - SpeakingMax英语口语达人

I don't know a unit of language which I use to communicate with you positively.

我不是主动地知道,交际用的语言单位。

耶鲁公开课 - 文学理论导论课程节选

And also had blind evaluators-- people who didn't know which condition they were in, evaluate how they were walking.

还找来盲测员-,那些不了解情况的人，评估他们的走路。

哈佛公开课 - 幸福课课程节选

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

Now that already tells us what we know, which is that the efficiency is going to be something less than zero, right?

我们都知道这个，这结果就是说效率,是负的，对吗？

麻省理工公开课 - 热力学与动力学课程节选

I was hoping for a simpler answer, which is, just run it. Which is, yeah I know, seems like a dumb thing to say, right?

我希望一个简单点儿的答案，比如说去运行它吧，这方法看起来挺笨的对不对？

麻省理工公开课 - 计算机科学及编程导论课程节选

I just happened, while I was a graduate student at Oxford University, to meet somebody who is vegetarian and start talking to him about the way we treat animals which I really didn't know much about.

那时我还在牛津攻读硕士研究生,偶然遇到了一个素食者,我们聊到人类是怎样对待动物的,当时我的确不是很了解。

普林斯顿公开课 - 人性课程节选

So it could be--From Hannibal's point of view he doesn't know which pass you're going to defend, but let's have a look at his payoffs.

站在汉尼拔的立场,他应该,不知道你会防守哪条路,但让我们看看他的收益

耶鲁公开课 - 博弈论课程节选

But there's no way for them to know which one is the one that's deceived.

但无从得知到底谁弄错了。

耶鲁公开课 - 死亡课程节选

If people don't know which foods are healthy well then it argues for education--but notice that that was almost the lowest ranked thing that people said.

要是人们不知道哪些食物是健康的,这关乎教育问题了,然而值得注意的是,这是大家提及最少的一个原因

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

One is in the U.S.at the Centers for Disease Control, where there is a sample of variola, which is kept, you know, frozen on ice in a heavily guarded facility.

一个在美国的疾病控制中心,那有一支天花病毒的样本,冰冻后置于重重保护之下

耶鲁公开课 - 生物医学工程探索课程节选

If you want to know which part of your brain is responsible for language, you could put somebody into a scanner and have them exposed to language or do a linguistic task or talk or something and then see what parts of their brain are active.

如果你想知道大脑的哪个区域,负责语言功能,你可以对被试进行扫描,让他们暴露在语言环境中,或是进行语言学任务,或者聊天,然后观察他们的哪些脑区处于活跃状态

耶鲁公开课 - 心理学导论课程节选

Those doctors would still not be able to improve school performance of the kids with learning disabilities and they would still not be able to prevent cognitive impairment and loss of memory in older adults because at this point we don't really understand enough about learning To know which neurons and synapses within a circuit would need to be tinkered with.

他恐怕还是改变不了有学习障碍的孩子们的表现,阻挡不了老年人的认知功能损害和记忆力的衰退,因为我们对这一学科的确知之甚少,不知道知道回路中的到底是哪些神经元和神经突触需要修复。

斯坦福公开课 - 7个颠覆你思想的演讲课程节选

And a lot of people want to know which are the best shows to see, like the best theatre.

很多人想知道最好看的表演是什么，比如哪里是最好的剧院。

伦敦旅游景点 - SpeakingMax英语口语达人

When they look at the price of a company, how do we know whether the price at which you're buying is reasonable?

当他们看到公司股价的时候,怎么知道买入的价格是合理的呢

耶鲁公开课 - 金融市场课程节选