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If the question of time is not explicitly brought up, then you should know that you have to use this formula.
如果时间的问题并没有明确提出,那你应该知道,必须要用这个式子
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Yeah, but I think it's also an important skill. You need to be able to express what you know
难，但是我也觉得这是一种重要的技能。你必须能够把你知道的表达出来，
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Well, the reason, the way that we can check it is just to see if it's in between our two extreme 1 cases. We know that it has to be more than 1, because even if we had total shielding, 1 we would at least feel is the effective of 1.
好的我们可以检查它的原因和方式是观察,它是否在我们的两种极端案例之间,我们知道它必须大于，因为即使如果我们有完全的屏蔽，我们最小感到的有效值是。
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So, all this language is produced because you can't ever get to that last thing; you have to keep hashing it over.
所以，这一切语言就产生了,因为你永远没法知道最后那点;,你必须一直详细讨论它。
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It would be much better if you had a reference point that didn't care where the pressure was.
我们还需要精确地定义气压,你必须知道气压的大小,当然如果我们能找到一个。
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Anybody who's envolved in this area has to know the president cares most about keeping the country safe.
所有有关的人,必须知道总统最重视的是,保卫国家安全。
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But the catch is that the party on the other end of things has to have that same machine or know that same number.
但是那个隐情是对立面的党派,必须有一个同样的机器或者知道那个密钥。
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But I had to deal with it and I knew I would have to deal with it.
但我必须克服这个问题,我知道必须克服它。
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Knowing what iambic pentameter is, is not a gift of birth, but rather something that comes through a little bit of practice, which means we have to work at it a little bit.
没有谁是生来就知道抑扬五音步格诗，是需要努力才能知道的，这说明我们必须在这个上面花点功夫。
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You don't have to buy into it; you just have to know it, okay.
你们不必想念它，但是你们必须知道它，好吧。
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And,as Chateaubriand said,the writer, "I don't know what we must believe but we must believe in something," and he gets down on his knees and prays.
如作家夏多布里昂所言,"我不知道我们能相信什么,但我们必须相信点什么",然后他屈膝跪下开始祈祷
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The new prince, as we've seen, must know how to use religion but needs to learn how not to be used by religion, must not become a dupe of the religious.
正如我们所看到的，这种新型君主必须知道,如何去利用宗教而不是被宗教所利用,必须避免成为受宗教愚弄摆布的对象。
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I just have to confess, I don't know what the best thing to say about these cases, I find myself inclined to think reassembled watch, same watch; reassembled tower, not same tower.
我必须得承认，我不知道,究竟怎么样解释这些例子好，我发现自己还是觉得,重组的手表是原来的手表;,重搭的塔并非原来的塔。
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You have to know where the vowels are supposed to go, and that makes it harder to learn how to read, but when you have the vowel sounds it's easier and the Greeks made that contribution.
你必须知道这些元音都应该加在哪,这使的学习阅读变得更加困难,但是如果填入元音,那么就会简单点,而希腊人在这方面做出了贡献
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I know you can't read these characters but just, if you had to tell me, which ones do you like and which ones don't you like ? or how much do you like each one?
我知道你们不会读这些字母,但是，如果你必须告诉我，它们当中，你喜欢哪些词汇,不喜欢哪些,对于每个词，到底有多喜欢？
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If we want to look going forward at the equity premium, we have to know how much--what's the politics?
如果想预测未来的股权溢价是多少,我们必须知道...政治环境将会如何
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What I want to do today is three things: I'm going to start-- actually, I shouldn't say start, I'm going to do a little bit of administrivia, the kinds of things you need to know about how we're going to run the course.
今天我要做三件事儿：,我要开始了--其实不应该说开始，我准备做一点儿文案工作，也就是关于怎么上课的,一些你们必须知道的东西。
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But Newton's law is-- You see, you've got to go back and wipe out everything you know.
但牛顿定律是,如你所知的,你必须回到过去,忘掉你所知道的一切
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But Milton's calling -- this is what John Milton knew his calling was to be a famous English poet, a famous English poet writing in English: a calling that he holds despite the fact that he appears to have written next to nothing in English verse.
但弥尔顿知道上帝对他的召唤,是成为一个有名的英语诗人，一个用英语写作的英语诗人：,他必须服从这个召唤,尽管他看上去不会写任何英语诗歌。
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So I think at least in our own case, it's not that I wish things were different, but I know we have to constantly balance and reinforce and build and sort of reinforce the behaviors we need in whatever business at that point in time.
所以我想至少对我们而言，并不是我希望事情能够有所不同就可以的，但是我知道必须不断的作出平衡,并加强，创立，再加强自身,在这个时期不论从事什么都必须这样做。
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So, I have to say, I am very excited now to introduce you to Dr. Taylor, Taylor who I would be teaching with this semester -- limited engagement -- who will tell you about some of the course policies.
才知道这个要求被允许了,所以我必须要说我，现在是十分激动的向你们介绍-,和我一起主讲的老师,她会告诉你们一些课程的相关政策。
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that after Lolita.) But what I mean is that the reader must know when and where to contribute his imagination, and this he does by trying to get clear the specific world the author places at his disposal.
有些人可能就会那样想）,但我的意思是,读者必须知道何时何地需要发挥想像力,这样以看清作者所设置的特定的世界,在这篇小品文中。
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So, we do this here for the photoelectric effect, and in terms of the photoelectric effect, what we know the important point is that the incoming photon has to be equal or greater in energy then the work function of the metal.
所以，我们做这个是为了说明，光电效应，在光电效应方面，我们知道的最重要的事情,就是入射的光子能量必须等于,或者大于金属的功函数。
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So, many of you are new to the Boston area, now I still realize, and I want to let you know it's not required that you be a Red Sox fan to be at MIT.
你们中很多人新来到波士顿地区，现在我仍认识到，我想让你们知道在麻省理工学院,不一定必须做一个红袜队的球迷。
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hi3 Whereas Hi3, I just created, it happens to live in this directory but my computer doesn't know that so you do dot slash which says current directory.
至于我刚刚创建的,它正好位于我电脑不知道的位置,所以你必须敲入，/，这代表当前目录。
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They understand that to compete, they're going to have to going to operate in Europe and in Asia.
他们知道要竞争，他们将来必须,到欧洲和亚洲发展。
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I wouldn't give a midterm, because I think it's a waste of time, except we have to have some sort of-- it gives you an indication how you're doing in the course.
我不想考期中,因为我觉得就是浪费时间,不过我们必须得有点什么,能让你知道你这门课学得怎么样了
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- And it's worth--; it's sort of a useful test for asking yourself -- what are the things you must value in life-- to ask, what would you choose to do if you knew you had five years, ten years, ? what have you?
而这值得;,这算是一种很有用的测试,用来问自己什么是你在生命中必须珍惜的事-,问你会怎么选择,如果你知道自己还有5年，10年，之类的时间？
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We know that it has to be equal to less than 2, because even if we had absolutely no shielding at 2 all, the highest z effective we could have is 2, so it makes perfect sense that we have a z effective that falls somewhere in the middle of those two.
我们知道它必须小于，因为即使完全没有一点屏蔽,最高的有效的z是，所以我们得到的有效电荷量处于,两者之间就非常讲得通了,让我们来看看另一个例子。
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