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So you need to know what some of those are.
你们需要了解其中几个。
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Yeah, but I think it's also an important skill. You need to be able to express what you know
难，但是我也觉得这是一种重要的技能。你必须能够把你知道的表达出来，
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You need to know what i prime is in terms of i and j.
你们要知道 i' 是如何用 i 和 j 表示的
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That's what you need to know if you're going to do life insurance.
如果你想从事人寿保险,你必须对它有所了解
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What else do you need to know?
你还需要知道什么？
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OK. I get the two values in, what do I need to do, well, you sort of know that, right?
好，有了这两个输入值了，我接下来将要做的，你知道对不对？
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So if you want to do well in 1504-- you'll know what you need to do, right?
如果各位想学好1504这门课-,你们知道该怎么做了，是吗？
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We know we need to divide by 266, 266 but what we need you to help us with is to figure out this top number here and see how many particles are going to backscatter. So if the TAs can come up and quickly hand out 1 particle to everyone.
知道背散射的概率就可以了，我们知道要除以,但还需要你们来搞清楚,分子上的数是多少，有多少个发生背散射的粒子,助教们请过来,把这些球分给同学们。
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and that's exactly what you need to, you know, develop your own passions.
这正是你需要的，培养自己的爱好。
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As shown in this cartoon here, again you don't need to know the details of this, but if you're interested in knowing what's the biological bases of the genetic code this is it.
像这个动画里画的那样,这里你也不需要了解细节,不过如果你很有兴趣想知道,遗传密码的生物学基础
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So we've got the firms, they're the players, I know what their strategies are, I know a little bit about the structure of the market, and I still need to tell you what payoffs are.
我们有了公司,作为参与人,我知道它们的策略是什么,对市场的结构也有一些了解,我还需要告诉你们收益是什么
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But this is a good example of what you need to know.
这个例子很好地说明了你需要知道什么
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So what I decided is that you need to know the whole book in the sense that you need to know all of the key terms and key points.
所以我决定了,我把掌握整本书的要求改为,你需要知道所有的关键词和关键点
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I think that's because there's a growing recognition that that's what you need to know and that the countries that are emerging successfully are those that have well developed financial institutions that are adopting the technology.
我认为这是因为在那里越来越多人认识到,这才是他们所急需的知识,并且那些成功崛起的国家,都拥有完善的金融机构,并且能够应用这些技术
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I know it's boring, but we need to do it so you know what the ground rules are.
我知道这很无聊，不过为了让你们了解规则,我们必须得做这个。
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What you need to know is that when m equals 0, 3dz2 it's 3 d z squared.
你们要知道的是,当m等于0时，它是。
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Computing square root. I'm going to capture it in a piece of code, I'm going to be able to refer to it by a name, and I'm going to suppress the details, meaning inside of that computation, you don't need to know what it does. You just need to know, if I give it the right kind of input, it'll give me back an input that satisfies the contract that I set up.
比如计算平方根,我会用一段代码来说明,我将给它命名,并且忽略细节,意思就是在这一段计算过程中,你不用知道它做了什么，你只需知道，如果我进行了正确的输入,它将会给我符合条件的输出。
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This is what's called the Bohr radius, and we'll explain - hopefully we'll get to it today where this Bohr radius name comes from, but for now what you need to know is just that it's a constant, just treat it like a constant, and it turns out to be equal to or about 1/2 an angstrom.
它叫做玻尔半径，我们后面会解释,希望我们今天可以讲到,波尔半径这个名称的由来，但现在你们只要记住,它是一个常数，只要把它当做一个常数对待，它等于,或者是1/2埃。
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What is this? This is a wonderful piece of abstraction. It is saying, you don't need to know squat about what's inside the body of this function. You don't have to worry about the parameter names, because they're going to be preserved, you don't need to worry about how I'm doing it, this tells you how you can use this, in order to use it correctly. Of course, I can then close it off, and off we go.
但是这能告诉你一些信息,这是什么？,这是一段完美的抽象,它的意思是你不需要知道,这个函数的内部构造，你不必担心参数是否重名，因为它们已经被预存了,你不需要担心我如何使用它,它告诉了你你该如何操作，从而正确的使用它，当然我也可以把它关掉。
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You need to know how to think about them in the same way we think about s and p orbitals, but for example, you don't yet need to know what all of the names are except for this 3 d z squared here.
你们只要知道，如何像考虑s和p轨道一样,来考虑它们，但你们不需要,知道它们的名字,除了这个3dz2轨道外。
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