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Now, we are very gentle in this course with respect to knowing integrals, but this is one you have to know.
这门课对积分,的要求并不高，但这个积分你们必须会算。
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I thought I still have to work for another 30, 40 years. I need to do something else.
我原本想，我还必须工作三四十年。但我需要做点别的事情。
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But once you start publishing things in between covers, you actually have to decide what goes in and what goes out.
但一旦你开始把书籍加上封面出版，你就必须决定要出版哪些书。
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You can adapt it for any sort of possible purpose, but the crucial thing is to keep the distinction between meaning and significance clear."
你可以为任何目的将其改编，但重要的是你必须,将意思和意义分清楚“
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Glucose has to get into cells, that's the main source of energy source that cells use, metabolism of glucose.
但葡萄糖又必须进入细胞,因为它是细胞能量的主要来源,即通过葡萄糖代谢产生能量
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But Aristotle used to think that if you want something to move, there has to be some agency making it move.
但亚里士多德认为,如果要让物体运动,那就必须有某种作用让它运动
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You can take heat energy and convert it to work energy and vice versa, and it doesn't say anything about that you have to waste heat if you're going to transform heat into work.
你可以把热能便成功,也可以反过来,但它对于如果你要把热变成功,就必须浪费热量这件事只字未提,它只是说这是能量。
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and he started with the position that you ought to cut taxes but only where you can find offsetting cuts and government spending.
最开始，他的观点是,减税是正道,但必须先想到如何补偿这部分损失,如何削减财政支出。
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It starts out in a straight line and then it hops off on a diagonal.
马以直线出发但必须飞对角线。
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They have to adapt it to their own situation, but in many ways they're copying technology.
他们必须要将这些技术与当地国情相结合,但在很多方面他们仍是在重复这些技术
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Their descendants will take possession of it, but only after tremendous struggle.
他们的后代将会占有它，但必须经过激烈的斗争。
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But like, someone has to tell us that Shakespeare was this great writer.
但必须有人教导我们,莎士比亚是位伟大的作家。
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But in order to do so, you have to use terms like "punishment" and "reward" and "reinforcement" in such a vague way that in the end you're not saying anything scientific.
但如果你要这样去做，你就必须将惩罚，奖励“,强化之类的术语概念模糊化,最终你所作出的解释便毫无科学性。
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Now, in that Northern society and here we're using labels pretty loosely, but so be it the northern states; and well I'll leave the outline up for the moment. No I won't.
现在,在北方社会,现在我们标记做得很散,但必须这样,北方的州,我呆会会给你们一个大纲,但不是现在
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It has to be something really big.
但必须是很重大的帮助。
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But when I had to go... I had to find a book that was in the business school library and I went there.
但当时我必须去……我不得不去商学院的图书馆找一本书，于是我就去了。
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but it is imperative that you do not forget things as simple as brushing your teeth.
但不要忘记像刷牙这样的小事也是必须的。
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But you have to submerge yourself in those groups, and I don't speak it enough,
但你必须把自己沉浸于这些小组里，我说得不够多。
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But what you have to do is you have to force yourself to forget that.
但你必须做的就是强迫自己忘记这点。
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Students get upset. Parents get upset. But at some point, students have to learn,
学生们忐忑不安，家长们也是。但从某种程度上讲，学生必须得学习教训，
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But I need to point out that there's another disadvantage that the fission case raises for the soul theory.
但我必须要指出，灵魂理论的裂变案例,其实还有一个缺点。
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And as an aside, those in the room who are among those more comfortable, even if we're not quite filling in blanks today, realize we will very quickly entice you with details that you don't already know.
说句题外话，你们中有一些,看起来聚精会神，实际上开小差的同学，也许我还不能对号入座，但这些人必须意识到，我会一笔带过,一些你们可能不懂的问题。
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But first we need to establish a few things about the occasion for this piece and about the genre, the literary genre of the mask in general.
但首先我们必须建立一些,关于此作品与流派，一般文学体裁《面具》的场合。
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Such a condition, a state of war, may mean a condition of open warfare, but not necessarily.
这样一种状态，战争状态，也许意味着公开的战争状态，但这也不是必须的。
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It's harder than you think, right, but that's the kind of thing that musicians, particularly percussion players, have to be able to execute.
比你想的要困难得多,但这就是音乐家,尤其是打击乐手所必须具备的能力
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You have to make those calculations and there are errors in that, but you come away with a population estimate of things like that.
你必须把这些都算进去,因为其中存在误差,但这样你会得出,整体人群摄取量的估算值
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We know it has to big anyway, since we can extract heat from it without changing the temperature.
我们知道它必须很大，因为我们得从中提取热量,但不改变它的温度。
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That sounds funny, but in a sense, that is--we have to define the sense in which it's irrelevant.
听起来很有意思,但从某种意义上讲,我们必须说清楚不相关性的含义
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He wasn't that widely read, I must admit, but it shows us how far pro-slavery could ultimately go.
我必须承认,他的作品流传不广,但他向人们展示了亲奴主义者可以走多远
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You have to learn them one by one, but you could produce a virtual infinity of sentences.
你必须一个个的去学习这些词,但你却可以创造出实际上无限的句子
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