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So when I expand this gas adiabatically and it cools down, why do you think it might cool down?
现在我们知道了气体绝热膨胀时,温度会下载，为什么会降温？
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But for me, I like to look at something and just say, "I like this. I don't really know why though."
但对我来说，我喜欢看着某个东西，然后说，“我喜欢这个。但我也不知道为什么。”
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And I don't know why, but since time immemorial that is the way computer scientists have drawn trees.
叶子是在最下面的，我不知道为什么,但从记事以来他们就是这么画树的,这也许就是为什么我们。
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If you don't know why you're about to eat cake like that you will soon, but you know this.
如果你现在还不知道为什么将要吃到那样的蛋糕,很快就会知道的，你清楚这一点。
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He says something, and he doesn't really know where those words come from. He doesn't really know what made his granny so angry about those words.
他不知道自己说了什么,更不知道为什么,这会让祖母抓狂。
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Now why--and here is the question why do we get this nervousness about the relationship between what I know and how I know it arising at this moment?
问题是,为什么那时候我们对,我知道什么和我如何知道的关系如此神经紧张？
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What psychologists don't really know is why the Lake Wobegon effect exists, and there are a couple of proposals.
但心理学家还不知道,为什么乌比冈效应会存在，目前有几个假设。
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So, we have beryllium in the first case here, it has four electrons, that's how we know it's beryllium, boron has five electrons.
那么我们将铍作为第一个例子，它有四个电子，这也是我们为什么能知道它是铍的原因，硼有五个电子。
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The theory doesn't try to explain why they separated. We don't know Perhaps it was disaffection.
这一理论并着力解释他们为什么分离，我们不知道,也许是因为逆反之意。
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Why did God place the stupid fruit in the garden in the first place if he knew in advance that Adam and Eve were going to eat the thing?
如果他事先就知道偷食禁果的事情会发生,为什么还要把这个不祥的果实就那么放在园子里？
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Does anybody know why so much time is spent on that? Yes?
有谁知道为什么要在这上面花这么多时间吗,你说
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Percent daily--no, I don't know why that's not on there actually.
日百分比,我也不知道它为什么没被标出来
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What's going on? Can someone tell me what's going on?
为什么呢,有人知道原因吗
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I don't know why.
不知道为什么。
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We're trying to understand exactly what changes in your brain when you learn and how those changes persist over time to support memory. And one thing that we know which helps explain why some things are easier to remember than other is that learning is not a unitary process.
我们一直都想查明，学习的时候，大脑到底发生了什么变化，这些变化是如何长时间控制记忆的,我们都知道，学习的过程不是一元化的,这就是为什么有的东西好记，有的东西难记。
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I started thinking, you know what, the reason why in the United States we have such a problem,
你知道我开始想什么了吗，我在想为什么在美国我们会出现如此的问题，
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And it makes you want to go get that insurance. I don't know why, but it does.
这让你想去买这家保险。我不知道为什么，但这就是这样。
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which is, I don't know why I really wanted the tent, but I really, really did.
当时，不知道为什么我那么想要，但是确实很想要。
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but your ankle is just bothering you for some reason you don't know why
你的脚踝一直影响你的发挥，但你不知道为什么。
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I can see the buildings around here are new. Do you know why?
我发现这里所有大厦都是新的。你知道为什么吗？
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This quantity is exactly zero for an ideal gas and we'll discover why eventually it has to do with what we mean by an ideal gas it turns out.
对理想气体它是零,这点我们接下来会知道是,为什么，这与为什么我们叫它理想气体有关。
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They got caught. You know why they got caught?
被发现了，你知道为什么会被知道吗？
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One wants to know why, why does he want to do that?
人们想知道为什么他想这么做？
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He wants to know how things work and why things are happening.
他想知道事物是如何运作的,以及为什么事情会发生
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Because they wanted to understand why.
因为他们想知道为什么。
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And the question is, so how many pigs does he have, and how many chickens does he have? Wow. What a deep problem, right? But you're going to see why we're going to use this in a second. So you know how to solve this, this is a fifth-grade problem, right?
为了避免歧义，这些猪和鸡都是健全的,现在问题是它到底有多少只猪和鸡呢？,多深刻的一个问题啊，对吗？,但是你将要看到的是,我们为什么要举这个例子,你知道如何解答这个问题？
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You didn't know who wrote it, where, when, how, why, and someone says to you, "I want you to draw some conclusions about that piece of writing.
你不知道是谁，在哪里，什么时间，怎么样，为什么要写,然后你被要求对篇文章，做一个总结。
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Also, it is cylindrically symmetric around the bonding axis, so this is how we know that it's a sigma orbital.
此外，它关于键轴是圆柱对称的，这就是为什么我们知道它是sigma轨道。
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Now, that is not the most general thing, but I'm sure you guys have some idea of why we are interested in that.
这并不是最普遍的情形,但我确定你们知道我们为什么喜欢它
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Because b minus 1 is now even.
一会儿你们就知道为什么了。
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