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But if you want to know the answer, and I knew it, but I forget what it is-- it doesn't matter.
如果你想知道答案,我曾经是知道答案的,不过我忘掉了,这不重要
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I want you to know if there is ever anything you want to say, you can be honest.
我想让你知道，如果你有任何事想跟我倾诉，你都可以诚实地跟我说。
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You know, if you want to measure the potential energy of something in a gravitational field, you have to define the zero somewhere, right, because it's arbitrary. You can set it anywhere you want. It's the same with enthalpy.
你知道，如果你想测量重力场,中某种东西的势能，你需要，在某处定义一个零点，对吧？,因为势能的值是任意的,你可以把它设定在。
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If you want to know something like when do you hit the ground, I think it's fairly clear what you have to do.
如果你想知道车子何时落地,我想你该做什么就很明显了
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But if you say, well, I don't know how to do this, I am not going to bother, don't grade the paper.
但是如果你说，好吧，我不知道怎么做这个，我想麻烦，别给试卷评分。
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If we want to know your blood pressure, you put on the cuff, you've got a measure.
如果想知道你的血压,把设备压在手腕处,就得到一个测量值
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So, conceptually if you've ever wondered why you get access in all of your functions to global variables that's because they're not down here, they're at the very top of RAM and any function can access that RAM way up there, but for now the interesting player in the story is this thing called the heap.
所以，如果你想知道为什么全局变量能在,所有的函数中使用,那是因为它们不在这下面，而是在内存的顶端,那样任意函数都可以在内存中使用它们，现在，这里面一个有用的角色是,叫做堆的东西。
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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 like, when you're going to Chinatown, it's good to know what you want to buy.
所以，如果你要去唐人街，你还是知道自己想买什么的好。
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And you want to know what they would do if they were in your shoes.
你想知道如果他们站在你的角度考虑他们会怎么做。
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Then, I was talking it over with another graduate student and he said, well if you want to find out why don't you ask J.R. Hicks?
随后,我和另一位研究生讨到了此问题,他说,如果你想知道,干嘛不直接去问J·R·希克斯
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if you’re curious what a friend from high school is up to.
如果你想知道你的高中同学过得怎么样，
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If you want to know the goddam truth, that makes an actor in the first place.
如果你想要知道真相，那在最开始成就以为演员。
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But if you wanted to know it You could, you would look at development and you'd watch the embryological development of a zebra and that's how you would learn the answer to your question.
但如果你想要知道答案,你就应当去观察斑马的发育过程,观察斑马的胚胎发育,这就是寻找该问题答案的方法
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If I say x is 2, I want to know, what's the square root of 2, well if you're enough of a geek, you'll say 1.41529 or whatever the heck it is, but in general, this doesn't help you find the square root.
如果我说X等于，我想知道，2的平方根是多少，那么如果你足够书呆子你就会说,1。41529或者随便什么玩意儿，但是大体上，它不会帮你算出平方根。
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If you'd like to ask who your friend's best friend is,
如果你想知道你朋友认为的最好的朋友是谁，
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Everyone knows from calculus that if you're trying to find a function about which you know only the derivative, you can always add a constant to one person's answer without changing anything.
学过微积分的人都知道,如果你想根据已知的导数,求出其原函数,你总是可以给某人的答案,随便加一个常数,且不影响结果
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If you want to know what the number c is, you say, let's put time t=0.
比如,如果你想知道系数c代表的是什么,我们令时间t=0
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If you think about what ancient food gathering habits used to be like, you see things like this where people are out gathering food that is growing naturally, and you can think about what would-- what sort of conditions this would create and what kind of hardships it would create.
如果你想知道古代食物采集的习惯,请看这张图,人类都在野外采集自然生长的食物,你可以设想到,条件有多恶劣,生存有多艰难
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If you want to know how fast it's moving at a given time, if you want to know the velocity, I just take the derivative of this answer, which is 10-10t.
如果你想知道它在给定时刻的运动有多快,如果你想知道它的速度,我只要对这个式子求导,得到10-10t
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If you want to know which part of your brain is responsible for language, you could put somebody into a scanner and have them exposed to language or do a linguistic task or talk or something and then see what parts of their brain are active.
如果你想知道大脑的哪个区域,负责语言功能,你可以对被试进行扫描,让他们暴露在语言环境中,或是进行语言学任务,或者聊天,然后观察他们的哪些脑区处于活跃状态
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