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If you've got a problem that has units associated with it, do the exercise of carrying the units through because, guess what?
如果你做到一个跟单位有关的题目，请你在做题目的时候密切注意它，因为，猜猜是什么？
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It's got exercises for you to do so at the end of each chapter, you do have a task to do.
里面为你准备了练习，所以在每章的结尾，你都有任务要完成。
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You've got to do it above this chunk of code, you've got to do it inside this chunk of code.
你不得不在一大段代码之上来实现它，你不得不在一大段代码之内来实现它。
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They cannot rest quietly in Hades unless their body has been properly buried; so you got to do it.
他们无法安息于地府,除非妥善安葬他们的肉身,所以必须要好好处理死者的尸体
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You've got to do it so you're right in the middle, so that the market is in the middle.
所以只能以均衡价格交易,而市场价就是均衡价格
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I've got a list, walk you through it an element at a time, do I look at each element of the list more than once?
你一次只能得到他的一个元素,我是不是把数组里面的每个元素，都过了大于等于一次？,你不这样认为么？大家有什么建议？
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You've got to ask yourself, let the time it takes to do a full circle, that's the time period, do a full circle.
你已经问你自己了,留足够的时间让它运动一整圈,那就是运动整个圆周的时间周期
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And, I've got evidence that you didn't do it because you didn't turn it in.
我有证据你没做,因为你没把它交上来。
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If you've got to torture somebody, I say in my nonethical mood,if you've got to torture somebody, do it to her.Don't do it to me.
如果你要找人折磨，我很没道德地说，如果你要折磨人，那就找她，别折磨我。
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So that's how we do it, but you got your car radio going.
我们都会这么做,打开你汽车上的收音机
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You can do better, you can do it through response You've got to sort of disabuse yourself of the problems in response which is to be think of yourself as just a passive reciever.
你们可以通过反应来得出更好的研究成果,在反应上你们要纠正自己,不要把自己当成,一个被动的接收者。
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That would be a very straightforward functional way to do it, but you could imagine that that's very labor intensive because you've got to separate each individual cell, and you've got to nurture it and then keep track and study what it becomes.
这是一种非常直截了当的有效方法,但你能想象这得耗费海量的人力,因为你得分离每一个细胞,并进行培养,然后还得追踪和研究它们的变化
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Once you've got that, you can do minus 7 times a vector Just take the vector, multiply it by Pi and flip it over.
明白这点之后,你就可以计算-7乘以矢量,只需用 π 去乘以那个矢量,然后将其方向调转
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So I keep saying I've got one thing hanging, it's the last thing I want to do, but I wanted you see how much of a difference this makes.
但是我想让大家先，明白这有多大的不同,首先让我们仔细的来看看。
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Because, as I said, you can only drive one car at a time and if you've got ten of them in the garage, then it doesn't really do you much good.
正如我说的,你只能一次开一辆车,但如果你的车库里有十辆,它实际上并不会给你带来更多的好处
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Well, when you do picture it, there's that room in your mind's eye. You've got a little picture of people sitting around the table perhaps, discussing the business of your club. Uh-oh, I've smuggled myself in as a spectator.
当你真的开始想象时，脑子里就会浮现出一个房间,人们围桌而坐，讨论俱乐部种种事宜，看，我又将自己作为旁观者带入其中了。
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So what the guy would do is he would say okay you've got--if it was local money if it was from this town if it was New Haven money there were New Haven banks the guy would immediately know what it's worth.
所以，那个人将会做的是说,好的，你的钱-如果它是当地货币,如果来自这个城镇,如果是纽黑文的纸币,当时有纽黑文银行,那么这个人将立刻知道它值多少钱。
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And if it returns a value, you've got to do something with that return value too, much like we did up here.
如果它返回了一个值，你便用那个返回值,做一些事情，就像我们刚在上面做的。
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What you're much better at doing is saying how do I take the problem I've got and map it into a class of algorithms about which I know and use the efficiencies of those to try and figure out how to make it work.
当你碰到问题的时候,更好的方法是把遇到的问题映射,到已经设计好的算法中去,并用这些算法来提高效率,来保证问题得到解决。
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Once you do that, I think it's fairly clear that it has got a y component that's given by cosine the x component is negative.
用了这个结论,我想很明显,y 分量由 cos φ 给出,它的 x 分量是负的
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