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It's fun. - What's the problem?- She doesn't like that, man. - You're pretty.- Don't touch me.
VOA: standard.other
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This should all sound incredibly familiar, like I'm just repeating myself in terms of photoelectric effect, because essentially that's what I'm doing, and that's one reason we spent so much time and did so many problem-set problems on the photoelectric effect.
这应该听起来极其熟悉，就像我在重复自己在讲光电效应时所说的话，因为基本上我正是在这样做，这也是我们在光电效应这个问题上,花这么多时间,做这么多习题的原因之一。
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We need to get you straightened up before you visit the client. "What's your problem anyway?"
我们得好好把你整理一下，你才能去见客户。“你究竟怎么搞的？”
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What's your problem? What's his problem?
VOA: standard.other
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And that's what these will be for on a weekly basis for each of the remaining problem sets.
这就是为那些每周剩余的习题集,而打好基础的。
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He says what South Korea and its allies have a problem with is the North's ability to deliver weapons of mass destruction at a long range, regardless of what is mounted on top of this particular rocket.
VOA: standard.2009.04.01
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Even so experimental a book as John Barth's Lost in the Funhouse is totally absorbed in the problem of what it would mean to write about yourself.
就算约翰，巴思的《迷失在游乐场》这么一部实验小说,也在专注一个问题,就是写关于自己经历的意义。
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Now, the strategy here is pretty clear. As often is for the continuous problem. What's the strategy? I pour in the gold till I run out of gold.
现在我们的战略已经很明显了,对连续性问题战略是怎么样的？,我先把所有金子,装进去。
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And I think--This strategy is one I'm very enthusiastic about but there still remains what's sometimes called the "Hard Problem of Consciousness" and this involves subjective experience.
这是我所热衷的策略,但却依然存在着,所谓的"意识难题",而这牵涉到个体的主观感受
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That's what we have to think about and it's a long-term problem.
这是我们要考虑的问题,这是个长期问题。
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Whenever you're asked on a problem, "What's the tension on the rope?"
不管什么题目问你,"绳子的张力是多少"
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What's true problem of that study?
这项研究到底揭示了什么问题？
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Another little pop quiz here, and these aren't trick questions necessarily, but if you had to guess what the bigger problem was in the developing world, so let's not just say outside the U.S.
我们再做一个小测试,这不是什么难题,你们猜猜,发展中国家面临最大的问题是什么,我们所说的不是美国以外的国家
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Same sort of subtraction problem, what do we have for the ionization energy of the 2 s electron?
进行类似的减法运算,得到的，2，s，电子的电离能应该是多大呢？
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That little semi-religious speech about modeling, I think economists, those of you who are Economics majors you're thinking, yeah, what's the problem?
有一条关于建模的准教训,对于经济学者,你们那些主修经济学的,应该经常问自己,出现什么问题了
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You say, "Yeah, here's a math problem I haven't solved before, but so what? I've just done so much math, " it holds no appeal to me before."
你会说“是的，我没解决过这个数学问题，那又怎样？我研究了太久的数学，我对它失去了兴感“
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What's the problem here?
这里有什么问题呢？
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Typically up till now, we've looked at things that can be done in sublinear time. Or, at worst, polynomial time. We'll now look at a problem that does not fall into that. And we'll start with what's called the continuous knapsack problem.
至今为止我们已经处理过,亚线性问题，最多也就是多项式问题,我们现在要看的问题则是不能用这些解决的,我们将要开始讲连续背包问题。
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It's kind of unsettling because we like to know what things are, but at the same time it's not really a big problem because as long as we know about the fact that a certain notion of literature exists in certain communities we can begin to do very interesting work precisely with that idea.
可能会有点让人不安，因为我们总想知道事物的定义，但知不知道,实际上问题不大,只要我们知道在特定群体中对文学有特定的认识,我们就能在这种认识上做文章。
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That gets us to the smart thief. Why is this thief smart? Because she took 600. And she learned 600 that in fact there is a good way to solve this problem. And that's what we're going to talk about next. And that's something called dynamic programming.
现在我们要当聪明的贼,这个贼为什么聪明呢？,因为它选择了,它知道这事实上是解决这个问题的好方法,这就是我们接下来要讲的,也就是动态编程。
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That's the question we're going to try and address. If we can do this, this is good, because first of all, it removes any questions about what machine I'm running on, it's talking about fundamentally, how hard is this problem, and the second thing is, it is going to do it specifically in terms of the input. Which is one of the things that I was worried about.
这是一个我们接下来要去,尝试和解决的问题，如果我们能做到的话会很不错，因为首先，它解决了结果可能和我,运行的计算机有关系的问题，因为这从根本了告诉了，我们这个问题的复杂度，第二件事情,就是这种方法可以依据输入的大小来计算,而这正是我最担心的地方。
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What we do in these walkthroughs for CS50 is really walk you through the week's problem set.
我们通过CS50课程的代码走查来达到解决,每周习题集的目的。
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Different understandings of what that piece means gives you different values, and that's a bit of a problem.
应该是半径为1角度为,弧度为2比圆周率的一半，稍微多一点。
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So now we're left with a problem that's but 500 pages large and so what might a human do now to find Mike even more closely?
现在我们只用翻500页就能解决问题了,接下来，怎么做才能离Mike这个名字更近一步？
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So what we'll do is this problem here, which is let's calculate out what the wavelength of radiation n would be emitted from a hydrogen atom if we start at the n equals 3 level and we go down to the n equals 2 level.
我们来做这个问题,让我们来计算一下,从n等于3到,等于2能级氢原子辐射的波长是多少。
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But let's look for a slight variant of it, where greedy is not so good. And that's what's called the zero-one knapsack problem.
但是让我们找一找它的一些变种，在这些变种中贪婪算法用处不大,这些问题也就是0/1背包问题。
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So one of the things I didn't say, it's sort of implicit here, is what is the thing I measuring the size of the problem in?
我有一点没有提及，这有点含蓄，这一点就是我怎么，来度量输入问题的大小呢？,一个数组的大小怎么来定义呢？
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The second question I want to ask is what's the base case? When do I get down to a problem that's small enough that it's basically trivial to solve? Here it was lists of size one. I could have stopped at lists of size two right. That's an easy comparison.
第二个问题是什么是基础条件？,我要将问题分解到何时才使得问题,小到可以解决的基本问题？,这里是当列表的长度为1有时候,我也可以在长度为2的时候停止分解,那是一个非常简单的对比。
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What's the problem here? What's underlying the problem?
这里潜在的问题到底是什么呢
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So this is kind of a modern show and that is kind of a retro language and it's also as will be one of the takeaways of this course completely irrelevant to what problem you are solving, the fact that this engineer is using--proclaiming to use Visual Basic really is not a compelling part of the story.
这看起来很时髦,像是重新流行的语言,当然，该语言是我们学习这门课程,过程中附带着要学习的,这与解决什么问题无关，事实上，使用VB真的不是,这个故事出彩的地方。
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