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That is to say, it strikes me that Darwin could very easily be considered a fourth hermeneut of suspicion.
也就是说，我突然想到,我们可以很容易地将达尔文看作是第四个怀疑解释论者。
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We practice six days a week, usually, you know, three to four hours a day,
通常我们每周练习六天，你知道，每天三到四个小时，
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So we can have four total hydrogens bonding here, - and we can think about how to describe these carbon- carbon bonds.
我们这里一共有四个氢原子成键，我们可以考虑怎么来-,描述碳碳键。
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In Book One alone there are four primary instances of what we can think of as this primary simile dynamic.
仅第一本里就有四个主要的例证,我们可以看作最初的明喻来源的动力。
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If we take nitrogen, we've got N2, and we've got one, two, three, four, five.
比如说氮，我们得到了氮气，我们有一个，两个，三个，四个，五个。
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Anyone wants to volunteer, we could have a fourth.
有谁想要做志愿者吗，我们就有第四个助教了。
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We have probably four great reform periods in American history.
我们美国历史上约有四个大改革时期
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And you can't... If the brain was wired up like a personal computer, it would take you four hours to recognize a face, but in fact, we could do things extremely quickly.
你无法,如果大脑是像个人电脑那样组装起来的话,那你识别出一张面孔就得花上四个小时,但事实上,我们能够非常迅速地完成某些事情
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Let's move to a four-chord chord progression.
我们接着来看包含四个和弦的和弦进程。
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At the moment we have been assigned four TAs, though looking around we won't need four TAs, but at the moment we have Da-Ihn Yoo, we have Michael Verriman, we have Andrey Ivanov, and we have Brian Reilly.
目前给我们安排了四个助教,虽然我觉得用不了四个,不过我们目前还是有余大有,和迈克尔·韦里曼和安德烈·伊凡诺夫,还有布莱恩·莱利
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So it does that for us so that you can get away with just knowing the address of the first byte and it will make sure that you know when to stop by including the special value so, in fact, get the string if you type in a three-letter word, we allocate four bytes no matter what because we need an additional byte 0 for this special sentinel value back slash zero at the very end.
它为我们做了这些事情，这样我们就可以,通过第一个字节的地址,它还可以通过包含一个特殊的值,来保证在哪里停止，如果你输入了一个三个字母的单词,就可以获得那个字符串，不管怎样，我们分配四个字节,因为我们在末端需要一个额外的字节,来保存这个特殊的标志值--反斜杠。
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So the Diadokhoi, the Greek plural of Diadochi, as we often refer to it, ended up splitting his army into four parts and four dynasties descending from the four successors.
所以这四个Diadokhoi，也就是Diadochi的复数形式，我们通常用这个词，最终将他的军队分割为四个部分,由此产生了四个王朝。
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We'd look over 4-month calendar.
我们会看整个四个月。
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So by parallel we mean - they're either both spin up remember that's our spin quantum number, that fourth quantum number.
所以我们意味着,它们都是自旋向上,记住我们的自旋量子数，是第四个量子数。
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if we think about electronegativity as a periodic trend we can just draw our nice periodic table here, and let's separate it into quadrants.
如果我们来思考一下电负性的周期性规律,我们可以把我们漂亮的周期表画在这，然后把它分成四个象限。
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So let's see, we started with 8 bonding electrons, and we used up only 4, so the answer is yes, we have 4 bonding electrons left.
那么让我们来看看，我们一开始有八个成键电子，然后只用掉了四个，因此答案应该是还有剩余，我们还剩下了四个成键电子。
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So we can put actually all 4 of our extra electrons in between the carbon and the nitrogen.
因此我们可以把这剩下的,四个电子都放在碳和氮之间。
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We need to fill in a total of four electrons.
我们一共需要填进四个电子。
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These were very young scientists, of course, so what you would expect that they would do, which makes sense, is go to someone more established in their field, because they have the completely radical revolutionary idea, let's just run it by someone before we go ahead and publish this paper that makes this huge statement about this fourth quantum number.
他们是非常年轻的科学家，所以你们可以想象他们会怎么做，很自然的，他们去请教他们领域里更权威的人，因为他们的概念是彻底的革命性的，让我们在发表这个关于,第四个量子数的巨大的发现之前,先和别人讨论一下。
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So let's picture what this looks like here, and we'll start with four and we'll add in our last two.
让我们想象一下它的样子，我们先给出四个，然后加上另外两个。
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So this is a thing, Week Number Four, saw very commonly, which was -- this is something we saw commonly and there's a couple of issues here.
所以这是一件事，第四个，一般的分解，那是我们讲解的东西,这里有好几个问题。
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We've probably had four major periods in American history of there's one other picture I wanted to put up.
在美国历史上,我们大约经历了四个时期,在我想贴的另一张图片上
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Sixteenth because we've got four impulses for each beat. Let's go on to the next here now a couple of questions we could ask.
十六分音符,因为每拍有四个冲动点,我们继续,还可以问几个问题
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It allows four bonds to form instead of just two.
我们把四个氢原子。
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For the carbon, we start with 4 valence electrons, we have 0 lone pair electrons minus 4, and we end up with a formal charge of 0.
对于碳，我们从四个价电子开始，我们有零个孤对电子，再减去四，最终我们有零个形式电荷。
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Yeah, so also 4. We started with 10 valence electrons, we used up 6 of those as bonding electrons, so we have 4 left, which will be lone pair electrons.
对，也是四个，我们从十个价电子开始，只用了六个来成键，因此我们还剩下四个，它们将成为孤对电子。
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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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So, we need to actually add on this fourth quantum number, 1/2 and it's either going to be plus 1/2 or negative 1/2.
所以我们需要加上这第四个量子数，它等于1/2或者负的。
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So we have four choices in terms of initial and final energy levels, and also what it means - in terms of the electron -- whether it's gaining energy or whether it's going to be emitting energy?
我们有这四个选项,各有不同的初始能量和末能量,它都是按照电子来说的,不管是失去能量还是得到能量？
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What we do care about is the energy of our orbitals that have electrons in them, and if we combined all four of the orbitals, then our hybrid orbitals would have more p character to them, so they'd actually be higher in energy.
是不是很高,我们不关心它的能量很高，我们关心的是，有电子的轨道的能量，如果我们把四个轨道结合。
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