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So,composition alone can't give you the answer to the question why is the plywood superior to the solid pine board?
只用组成成分无法解答,这个问题,为什么胶合板要优于松木板呢？
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You can answer to this question, someone says, "Well, what are you doing? Are you still here at school?"
当有人问你，“嗯……你在做什么呢？你还在学校吗？”你就可以回答了，
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And if they can't answer that question, I say well, before you even run it, have an answer to that.
如果他们没法回答这个问题的话，我会说好吧，在你运行实验之前，先回答这个问题吧。
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Yes or no. That can give you a true or false, a one or a zero answer. What about this?
是或者否，它告诉你真假，1，或，0，这个怎么样？
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And if your answer is no, your answer will be no, then you just know you can't use this equation here.
如果不是，那就不能，你就知道，你不能用这个方程了。
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In fact, once you think about it, and not all that long, you can see the answer's got to be no.
事实上,只要你想一想,不用太久,你就会知道答案是否定的
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But then having found one answer, you can add to it anything that gets killed by the act of taking derivatives.
一旦你算出了一个答案,你就可以往式子里加入任何,在求完导后消失的项
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I'll start you off with the wrong answer and this, by the way, can be found on this web site.
我先例举几个错误的答案,这些都可以在这个网站上找到。
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Well you can read the story, it's in Numbers 20, the incident is described there. But the answer is still not entirely clear, it's not clear what Moses did that was so bad as to deserve this punishment.
你们可以阅读这个故事，在民数记20，讲述了这个事件,然而答案却仍然不是完全清楚的，摩西究竟做了什么,坏事才遭受这样的惩罚，还不完全清楚。
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And the answer is: you can do that because you're both kings.
答案是,你可以这么做,因为你们都是国王
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You can run the Taylor rule to get the answer.
说，可以通过泰勒规则来得到答案。
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It's the safer answer if you can't decide whether or not your opponent's going to choose Left or Right, so you don't have to worry about having a payoff of 0.
当你无法判断你的对手会选左还是右时,选下是较安全的答案,因此你不必担心收益变成0
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What do you think she means? Can someone answer that?
你们觉得她是什么意思,有人能回答吗
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And the answer is you probably can't.
通常情况下你是叫不出几个名字的。
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So once you look at Star Festival then you can think about the questions you have to answer and then question maybe the same thing I ask myself: who am I? While maybe some other questions.
所以当你看“七夕“的时候,你可以考虑你必须要回答的问题,这个问题有可能是我问自己的那个同样的问题：,我是谁？或者其它的问题。
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So you can guess the answer usually that way.
用这种方法猜到一些答案。
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My answer is, you can't change one but you can create a new one that is almost like the old one but different in a little bit.
既然你不能改变元组,你可以新建一个跟原来的元组,大体上一致但有细微差别的元组。
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I can tell you the answer, but that's because I've cheated, run the program before.
我可以告诉你答案，但这是因为我作弊了，我之前运行过一次程序。
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So we have to ask now, now that my claim is, you can ask me any question you want about this particle and I can answer you.
现在我们要问,我的观点是,你可以问我任何关于,这个质点的问题,我都可以回答你们
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So hopefully if some of you have your calculators with you, you can confirm the answer that I got, which is that the energy is 7.82 times 10 to the -19 joules.
所以如果你们带了计算器,希望你们也能确认一下，我们算出的答案，能量等于,7，82乘以10的-19次方焦耳。
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Compare after 30 or 60 seconds with the person next to you and see if before I reveal the answer we can't get everyone on to the exact same page.
和你身边的人比较30到60秒钟,看看是否在我揭露答案之前，我们不能使每个人,得到一个完全相同的页面。
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What else can you detect as a yes or no answer is the mouse down?
当鼠标点下时，除了检查真假还能检测什么？
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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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You can do that, but we like to get the answer the way this gentleman described it, because we like to get an answer more readily than by doing the mundane work.
你可以那样做,但是我们喜欢,用这位同学所说的方法来得到结果,因为我们喜欢更简洁地获得结果,而不是通过繁琐的计算
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And the answer is, you can use a variable anywhere you can use the value.
答案是，在需要用到值的,任何地方都可以使用变量。
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And my real answer is, go try it out, because obviously you can tell I frequently do this the wrong way and the TAs give me a hard time every time. John.
你可以，而我真正的答案是去试一试吧,因为很明显你可以发现我老是做错,而我的助教总是给我难堪，约翰。
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