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"I do not have a problem and I do not know anybody who has a problem. But the 'boogey man' Obama is trying to state that we have a problem, and he wants to tax us,"
VOA: standard.2009.09.02
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And, we knew that if we know the crystal structure we can get the Madelung constant, not a problem.
我们都知道只要有了晶体结构,就能知道马德隆常数。
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I started thinking, you know what, the reason why in the United States we have such a problem,
你知道我开始想什么了吗，我在想为什么在美国我们会出现如此的问题，
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And so this is not like a math problem set or a physics problem set. Or, like a high school physics lab, where we all know what the answer should be, and you could fake your lab results anyway.
或是物理问题集合,又或者是高中的物理实验室，我们对这些问题都有确切的答案，或者你可以把你的实验结果改成正确的，有些事情是不能明确界定的。
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The Greeks, as far as I know, did not allow anybody to be left handed in a phalanx; think about the problem.
希腊人,据我所知,在方阵里中不允许有左撇子,思考下这个问题
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So this should immediately look like a problem because we know, in fact, that methane is tetravalent, and this is telling us it's only divalent.
显然这看起来是一个问题,因为我们知道实际上，甲烷是四价的，而这告诉我们它仅仅是二价的。
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Taking the problem, recognizing that you know what, 8 even though this is a pretty big problem size 8 in this case and last time it was size 8 or in the case of the papers in size of a thousand roughly with the phonebook, I assume these are in a perfectly straight line they won't quite fit.
以这个问题为例，你们要认识到，在这种情况下，这是个比较大的问题，其大小是,上次它的大小也是8，但在纸片那个问题中,电话簿的规模大概是上千的，现在假设这些,杯子完全在同一条直线上，虽然并不十分符合这个条件。
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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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Newton says F = ma, so to make it a useful result of this problem, we know the mass of this guy.
牛顿指出 F = ma,这对于解决这个问题很有用,我们知道这个物体的质量
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And secondly, I think that, even if they don't know how to do a problem,
二是，我觉得，即使他们不知道怎么做一道题，
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I know, for a lot of you, it's like, OK, I got a heavy problem. Let's see, def Foobar open paren, a bunch of parameters.
我知道这对你们中的大多数人来说，应该没问题了，好，这儿我碰到了，一个严重的问题，我们看看，一堆参数。
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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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And the question is, so how many pigs does he have, and how many chickens does he have? Wow. What a deep problem, right? But you're going to see why we're going to use this in a second. So you know how to solve this, this is a fifth-grade problem, right?
为了避免歧义，这些猪和鸡都是健全的,现在问题是它到底有多少只猪和鸡呢？,多深刻的一个问题啊，对吗？,但是你将要看到的是,我们为什么要举这个例子,你知道如何解答这个问题？
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The other thing I want to let you know is that instead of having a new problem-set that you'll be assigned this Friday, what we'll do instead is we'll give you some practice problems, and these will be just more of the same type of problems that you saw before but that's another chance to try them out more.
另外一件我想要告诉大家的是,这周五将不会像往常一样,给大家布置新的作业,而是给你们一些练习题，这些题目只是另一些跟原来同样类型的习题,你们应该都已经见过类似的,但这是尝试再次解决这类题目的机会。
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I stress it in particular because I know you're all going to get into this stage; you've got a problem set due in a couple of hours, you're still writing the code, you don't want to waste time, and I'm going to use quotes on "waste time", doing those extra things to do the defensive programming, you just want to get the darn thing done.
我特别强调了这一点,因为我知道你们都会慢慢成为程序员;,你在写代码过程中造成了一系列的错误，你还在写代码，你不想浪费时间，我想把“浪费时间“用引号圈起来，浪费时间来做因为防卫性程序设计，而带来的这些额外的事情,你只想赶紧把程序写完，这不是一个好习惯，因为当你做完回头。
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So, many people have relatives they know of that have had to have their heart imaged -- heart disease is a major problem in the United States, and there's a good chance that they had Cardiolite given to them to help in that imaging process.
它被用在心脏成像中,很多人都有一些亲戚他们-,必须要做心脏成像，心脏病已经是美国的一个主要问题,而很有可能他们就要用到Cardiolite来成像。
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We did the comparison with the elephant or something; a is the second derivative of x and for this problem, when F is due to a spring, we know the force is that by studying the spring.
我们也已经把它与大象或其它东西作过比较,a 是 x 的二阶导数,在这个问题中,F 是由弹簧产生的,我们在讨论弹簧问题时已经知道了力的大小
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So it's a short problem set, but make sure you know how to do those problems.
因此这是个小问题集,但是确保你懂怎么解决这些问题。
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