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But it's possible,I suggested, that we really shouldn't focus on the question, what does it take for me to survive?
但我认为，很可能，那根本不是我们应该重视的问题，比起讨论我要存活下去需要什么条件？
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Let's say that you and your co-workers are trying to make a decision about whether to put a plan forward.
假如你和你的同事正在讨论是否需要推进一个计划。
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One more thing, I said they're not independent, so we have to talk about the covariance between the returns.
还有，我说过它们不是相互独立的，因此我们还需要讨论两个收益率的协方差。
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And of course you will come to your discussion sections in the same state of joyful preparedness.
当然你们也需要参与到讨论中来,并做好充分的课前准备。
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OK. So to do this, we need a little more abstract way of talking about efficiency, and so, the question is, how do we think about efficiency? Typically there's two things we want to measure.
好，为了达到这个目的,我们需要用一种有点，抽象的方式去讨论效率，这衍生出来,一个问题，我们该怎么去认识效率？,主要来说我们有两个要量化的东西。
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Nutrients get broken down into several classes and these are the constituents of food that your body uses for one purpose or another.
营养素这个问题需要花几节课来讨论,它们是食物的组成要素,供给身体吸收,支持身体机能运转
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And this is just an incredibly important area that thermodynamics allows us to speak to.
这是热力学中我们需要讨论的一个,很重要的领域。
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Remember, we're talking about angular nodes here, so you need to read the question carefully.
要知道，我们这里讨论的是角向节点，大家需要看清题目问的是什么。
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Now I think you may be rather happy to hear that this is the last time --I'm pretty sure that this is the last time - that we will have to discuss, at least at any length, Milton's worries about his unreadiness and his un-preparation.
你们可能会很高兴知道,这是我们最后一次-我对此非常确信,最后一次需要仔细的讨论，弥尔顿对他自身的犹疑和毫无准备的焦虑感。
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For our purpose I think we won't have to go there.
根据我们的目的,我们不需要讨论这个。
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Ultimately, we need a filter or a lens to talk about then what is ultimately in control.
最终，我们需要一个视窗，一个镜头,来讨论什么是最终的控制者。
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You should be bringing some of the things we talked about when discussing his work, into dialogue with and in conflict with some of the evidence you'll be finding in the text itself.
我们需要回想以前讨论,在上帝与别人的对话中,你可以发现前后矛盾的地方。
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The other thing that I think would come out of the discussions is that diversification is important.
另一个需要讨论的话题是,分散投资很重要
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And an important thing to remember when we talk about resonance hybrids is that the structure it's not 1/2 the time this structure, and 1/2 of the time this structure, it's actually some combination or some average between the two structures.
而当我们讨论共振杂化的时候,有一件重要的事情需要牢记,那就是这种结构并不是,一半时间处于这种结构的状态，而另外一半时间又变成了这种结构的状态，它实际上是两种结构在,一定程度上的组合或者平均。
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We also need some measure of-- We've been talking here about measures of central tendency only and in finance we need, as well, measures of dispersion, which is how much something varies.
我们也需要其他的指标,目前为止,我们只讨论了集中趋势指标,在金融学中,我们同样需要,离散趋势指标以衡量参数的变化程度
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So it's worth knowing in a general way what you need to do to earn a good grade in discussion section and here the answer is, perhaps the obvious one, you need to participate.
现在值得让你们知道什么是你们要做的,去得到好的分数在课堂讨论并且答案是，也许最显然的一个是，你需要去参与。
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I'll let you read Siegel and his discussion of this possibility, ... but I think that-- what I want to get now is not necessarily any agreement on whether you believe that there's such a high excess return for stocks.
我会要求你们读西格尔的书,以及他对这种可能性的讨论，但是我认为-,你们并不需要,同意炒股的收益,远远高于其他的投资方式。
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It's also important, once we start talking about molecules, to have a way to represent them, and also to be able to look at a shorthand notation for a certain molecule and understand what the bond is.
还有很重要一点是，一旦我们开始讨论分子，我们需要有一种表示它们的方法，而且能够从中看出,某些分子的简化符号，并得知键的类型。
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Rather, you've got to be a wonderful class citizen A to get an A for discussion section.
而是，你需要成为一个很棒的学生,能够在课堂讨论环节得到。
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And that is the last one we're going to describe.
这是我们最后需要讨论的物理量。
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But again for all our purposes, we don't have to go there.
但就我们的目的而言，我们不需要讨论这个。
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I'm going to start with those and then I'll turn, eventually, to another set of possible things that might need explaining, which we might think of as extraordinary, supernatural things.
我将从这里开始,然后转而讨论,另一些,需要给予解释的现象,那些我们可能视之为异乎寻常的,超自然现象
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You need to come to discussion sections having thought about the lectures, having done the readings, having thought about the questions that they raise, and you need to come to discussion section then prepared to discuss this week's set of issues.
你需要去参与讨论给出自己的想法，去读阅读材料，去想他们提出的问题，并且你需要去讨论,然后准备去讨论这个星期的话题。
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So that means that we don't have to worry about things like wave functions when we're talking about Lewis structures, but because they're so simple to use and because they so often predict the electron configuration of molecules accurately, we end up using them all the time in chemistry, so it's very valuable to know how to draw them correctly and to know how to work with them.
因此这也就意味着我们在讨论路易斯结构的时候,不需要担心波函数之类的东西，但是由于路易斯结构不仅简单易用,而且用它来预测分子的电子排布,经常可以得到非常精确的结果，结果我们在化学中一直都在用它，因此知道如何正确地画出并运用,路易斯结构是非常有价值的。
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It's kind of ironic that we put this in the same lecture as we talk about atomic radii, which we also call r, but they're two different r's, so you need to keep them separated in terms of what you're talking about.
有点讽刺的是,我们在同一堂课里还讨论过了原子半径，它也是用，r，表示的，但是它们具有不同的意义，因此大家需要注意区分它们,弄清楚我们讨论的是哪一个。
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And what you can see is that 0 for any n that has an l equals 0, you can see here how there's only one possibility for and orbital description, and that's why we don't need to include the m m when we're talking about and s orbital.
你们可以看到,对于任何n，如果l等于，你们从这里可以看到，只有，一种,可能的轨道描述，所以,当讨论s轨道的时候,不需要考虑。
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l But now we need to talk about l and m as well. So now when we talk about a ground state in terms of wave function, we need to talk about the wave function of 1, 0, 0, and again, as a function of r, theta and phi.
但我们现在需要讨论,和m，现在当我们讨论,波函数的基态时，我们讨论的，是1，0，0的波函数，同样的，它也是r，theta和phi的函数。
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