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But, the reaction says I need twice as much mag as tickle if this reaction is going to go to completion.
但是这个反应告诉我们,镁的量应该是四氯化钛的两倍,如果要反应完全的话。
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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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You'll remember it features a succession of four mourners, and we could think of each of these mourners providing Milton with an opportunity to try out a different voice.
你们会记得它写到了四名送葬者的相互交替，我们可以把他们,看作弥尔顿想要发出与世不同的论道。
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Let's see what happens here, just the motif, one, two, three, four, three four, one two, and then the theme.
让我们看看到底发生了什么,正是动机,一,二,三,四,一遍又一遍,然后是主题
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Well, Fahrenheit came along and thought, well, you know, 7-1/2, that's kind of silly; 22-1/2 that's, kind of silly So let's multiply everything by four.
然后华伦海特来了，他想，7。5，听起来有些犯傻;,22。5，那也够傻的,我们还是把所有的东西乘以四吧。
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But he continued to say "it is possible; there is no human limitation on that; " we can run the mile in under 4 minutes."
但他还是说“有可能;,在这件事上人类没有极限;,我们能在四分钟之内跑完一英里“
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We, who live in a very different kind of world from that of, you know, fourth-century Athens, ? what can we learn from the example of Socrates?
我们活在非常不同的世界,显著不同于四世纪的雅典，我们能从苏格拉底的例子上学到什么？
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There are four different bases, which I'll talk about in a moment.
有四种不同的碱基,一会我们会讲到
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Let's take a circle and just keep a quarter of the circle.
我们来画一个圆,只画四分之一圆即可
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Okay, so now we've seen four different combinations.
目前为止我们看到了四种组合
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Now, think what's at stake here in this worldview, especially as we transition next Thursday to a developing though by no means unanimous or homogenous northern worldview in which reform impulses get embedded.
想想在这种世界观中最薄弱的是什么,特别是我们下周四要过渡到,一个发展中的并非统一或同质的,嵌入了改革的冲动的北方世界观
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In the case of France again, since we're talking so much about Louis XIV, they call the Estates General, which is to represent all the provinces after the assassination of Henry IV in 1610 or 1612.
以法国为例,我们已经谈论很多关于路易十四的事,在1610年或者是1612年,亨利四世被刺杀之后,召开了三级会议,以代表各省利益
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Have we got four?
我们有四个人吗
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Now we don't care what you're eating so nobody-- we're not going to attend to that at all; I mean you could eat Twinkies four times a day and that could be your total diet, or you could eat something else; it doesn't really matter so much.
我不在乎你们吃了什么,我们不关注这点,也就是说你们可以一天吃下四顿奶油夹心,作为一天的饮食,或者吃点别的,这没多大关系
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It's 109 . 5 is what we would expect for methane because it's tetravalent, but here we're just seeing something that's divalent, and they're both in p orbitals that are perpendicular to each other.
因为甲烷是四价的，我们预测是109。,但这里我们，看到的是二价的，它们都在。
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So then in order to figure out the complete number of valence electrons in our molecule, we just add 5 plus 4 plus 1.
那么接下来为了得到,这个分子中价电子的总个数，我们只需要将五加上四，再加上一。
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So in our first structure, we would find for the nitrogen we have a formal charge 5 minus 4 minus 2, because we're starting with 5 valence electrons, so that is a formal charge of minus 1.
那么在我们的第一个结构中，我们发现氮的形式电荷量是五减去四4,再减去二，因为我们开始有五个价电子，因此它的形式电荷量是负一。
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So this should immediately look like a problem because we know, in fact, that methane is tetravalent, and this is telling us it's only divalent.
显然这看起来是一个问题,因为我们知道实际上，甲烷是四价的，而这告诉我们它仅仅是二价的。
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We have the convention of music of writing this symbol indicating the beat-carrying unit of four so I'm writing a four underneath each of these.
我们有一个约定俗成的书写格式,来表示四拍一单元,所以我在每行这里的下面写上一个四
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We're going to do this in four, just for-- just because I think it works out better so everybody tap your foot with a four beat.
我们只做四拍,因为我觉得这样的效果更好,大家都用脚打四个拍子
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These units we call bars or measures and just to finish this off down here we would have three quarter notes of course, in this particular arrangement.
这些单元我们称之为小节,我们来把接下来的写完,这里我们有三个四分音符,当然,按照特定的安排
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Okay. So here we have a series of groups of two quarter notes.
好的,我们有好多的单元,由两个四分音符组成
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Okay. So that's the music. Now having done this setup, if you think about it, and think about the fact that what note symbol gets the beat in our course- quarter note, okay.
好,这就是音乐,做过这一套以后,如果你在思考,那么想一想,在我们课程中用来代表节拍的是什么音符,四分音符,好的
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As you may know, there's yet another organization where we could group this in units of four but for all intents and purposes-- there are a few nuances to it-- four is simply a multiplication of two.
也许你知道的,还有另外一种组织方式,我们可以四拍一组,但是不论出于什么动机或者目的,这其中的区别甚微,四拍就是两拍的简单相乘
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It adds fifty percent or a half to that and that means instead of two quarter notes that we now have three and we can do the same thing to any one of these other values here and that's how we get our triple relationships.
加上了百分之五十或者说一半的原音符值,这意味着除了有两个四分音符,我们现在有三个了,我们也可以在其他这些音符值后加上附点,这就是我们如何做到三倍形式的安排的
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Notice that once we've deleted the dominated strategies, you know I had said before about four people chose this strategy, and in here, about four people chose this strategy, but in this range 30 through 45, I had lots of people.
注意,一旦我们剔除了劣势策略,我们已知有四人选择了,在45到67之间的数,但是选择30到45的有不少
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That's not really all that important for us because what's important for us is to see at this point, either 200 or 400,what was included and what was not.
这对我们并不怎么重要,因为重要的是在那个时期，即主后两百年或四百年，书目上有哪些书。
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You're doing eighth notes and the rest of us are doing-- other people are doing quarter notes. Okay.
你是用八分音符,我们剩下的人,即其他人是用四分音符,没事的
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