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If you read a quick plot summary here, I'll just give you a little teaser. All right.
如果你阅读一下这个概要，我将给你一个小的技巧，好的。
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So technically, if you ask what does the velocity stand for-- Let me draw a general situation.
从学术角度来说,如果你问速度表示什么,那让我来给你画一个常见的场景
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It turns out you can list one, give it a name, and if you use square brackets, that tells the compiler I actually want to put multiple values inside of this -- inside of this variable and how do we do that?
结果是你可以列举一个，给它取个名字，如果你使用方括号，那是告诉编译器,在里面我需要许多的值--在这些变量里,我怎么做到的？
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If you were giving a job talk-- and this is for people in graduate school particularly-- If you were giving a job talk and the slide projector breaks, you're screwed.
如果你要做一个职业演讲-,特别是给研究生院做-,如果你正在做演讲，结果投影机坏了，你完蛋了。
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For example, if there's a homeowner who you've lent money to and the homeowner is defaulting on the mortgage, the homeowner might wreck the house -that happens all the time -or they might steal things from it.
比如,如果你贷款给一个房主,但是他违约不还贷,并可能在房子里搞破坏,这种事情经常发生,他们还可能会从房子里偷东西
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Let me ask another question, if you give this-- and we'll talk about this in a later lecture, but if you give this diet to laboratory animal-- rats, mice, whatever-- it's very common for animals to gain a good bit of weight when given access to this diet.
我们来看另一个问题,如果你给,我们将在以后的课上讨论这个话题,但如果你给实验室动物,像小白鼠之类的,给予某种类型的饮食,这种饮食习惯会使得体重增加
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One thinks, in a way, of Welles' line in The Third Man : when he looks down from above and says, "If I gave you 20,000 pounds for every dot that stopped moving, "? would you really tell me to keep my money?"
从某一层面看来，可以假想，Welles，在《黑狱亡魂》中的台词,当他从高处往下看并说，“如果你干掉一个在下面走动的人,我就给你，20，000，英镑，你拒绝得了吗“
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It is true that if you give me the time, I can tell you the velocity.
如果你给我一个时间,我就可以明确告诉你速度
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If I give you a function, you know how to take the derivative.
如果我给你一个函数,你就知道如何求导
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If you give me another vector, there's another pair of numbers.
如果你给我另一个矢量,就会有另一组系数
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And she would intercept them as they came across the rickety bridge, or the low bridge, and she would ask them a few questions and ?" conclude with, "Can you write me a story? " You would help me out with my experiment if you'd just write a little story right now."
她会拦住他们,当他们分别横过摇晃的桥和低矮平稳的桥时，她会问一些问题,最后一个问题是“能为我写一个故事吗“,我将解决实验中遇到的瓶颈,如果你能立即给我写一个小故事“
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If you pay me ten thousand dollars a month to work for you, I'll work for you and I'll think "I'm doing it for ten thousand dollars a month, that makes a lot of sense," but if I do it for nothing then I have to ask myself, "Why am I doing it?"
如果你一个月给我一万美元帮你工作，我会为你工作，但我会想,”我是为了一万美元才做的，这样更合理“,但如果我一点报酬都没有，那我就会问我自己，”我为什么要做这份工作？”
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If we did that, if we moved f minus 32 over to the left, that would give me a floating point answer because f is a float.
如果你那样做，如果我们把，放前面，那将会给我们一个浮点数答案,因为f是浮点数。
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int So whereas before I mentioned int, turns out if you wanna put a string in a variable, you have to say this is a string.
先不管我之前提到的，如果你想把一个字符串赋给某个变量，那你必须事先声明这个变量是string类型的。
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Right now at this point in our course, whenever you have a problem where there is some body and someone says, "Write all the forces on it", what you have to do is very simple.
现在在我们这个课程里,如果你遇到一道题目,题目给了你一个物体,并要求你,"写出该物体所受的所有力",你要做的其实很简单
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We've seen in class that you get garbage values if you don't initialize something to a value so let me actually initialize x to a value.
我们在课程上了解到，如果你不给一个变量,进行赋值，它会获得一个无效值,让我把x初始化为一个值。
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So I just have to see, oh, here's a D, let me keep looking, D here's an A, keep looking here's a V, here's an I, here's a D and yet, and this is one tidbit we introduced a week or so ago, how do I now know if I'm just given the address of the start of the string where the end is?
我只需要看到，哦，这里是一个D，让我接着往下看，这里是A，接着这是V，这是I，这是,然而，这是我们一周以前介绍的花絮，如果你给我一个字符串开始的地址,我怎么知道它什么时候结束？
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