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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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I know to be a judge, you can't just become a judge, you usually have to practice as a lawyer first.
就我所知，你不能一开始就成为法官，你必须先成为一名律师。
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Or if you want negative numbers, between negative 2 billion and positive 2 billion, but it's a finite range.
或者你想储存一个负数，就必须位于负20亿到,正20亿之间，是个有限的范围。
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What this has to do with global economy is that you have to be able to feed the population.
这与世界贸易之间的关系,就在于你必须先让民众衣食无忧
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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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If you're a dealer, you've got to keep your bid-ask at market; otherwise, you'll get only one side or the other, right?
如果你是中间商,你的出价必须与市场一致,否则就只能拆东补西
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So you have a tradeoff almost it's almost like a Yin and a Yang.
所以你必须做一个抉择，就像阴阳之间的。
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So you try, if you can grow grain on your land or you grow it where you can, if not, you have to get it elsewhere.
所以你要有一个,如果你的土地适合耕种谷物,或者其它任何可以生产谷物的地方,如果不能,你就必须换个地方了
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I do think you'll have to walk and talk if you are teaching something.
我确实认为如果你想教什么你就必须擅长。
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So, to pursue this course properly you have to do both.
因此,想要学好这门课程,你就必须两者兼顾
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.. But McCain is, McCain wants to increase... What you are saying effectively is the next president must raise taxes in a massive way Because you are saying you can only cut taxes if you cut spending.
然而麦凯恩想要增加。,那照你的意思,下届政府必须大幅增税了，毫无悬念,因为你说一旦减税,就必须跟着精简开支。
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But then I got to college and they said, "Well, if you're thinking about anything bio biopsychology, biology -- you have to take chemistry."
但我去了大学后别人都说：,“如果你要学关于生物的课程,生物心理学，生物医学，你就必须学化学“
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Now--it's important to bear in mind that this view is perfectly compatible with being a physicalist, after all we're not saying that in order to have personalities you need to have something not unphysical.
你们必须牢记，这个论调,与作为物理主义学者的身份,并不冲突，我们并不是说,要接受人格存在的概念,你就必须接受一些非物质的思想。
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Because in Spain you have to choose your major like when you start university,
因为在西班牙你必须刚上大学就选择专业，
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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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If you want to lose electron, you have to find someplace for that electron to go.
如果你想要失去一个电子，你就必须为它找到一个可去的地方。
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The red blood cells that carry oxygen only live within your circulation for about a month and so you have to continually be replacing cells that are dying and so there are cells that are proliferating.
携带氧的红细胞,在你的循环系统中的寿命只有一个月,因此你必须持续不断地更新衰老的细胞,所以就有在增殖的细胞
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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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So, if you want to designate anything it has to be by tangible things like pottery,particularly painted pottery,because it's easier to categorize.
所以 如果你想标注某段时期,你必须借助有形的事物,就像陶器,尤其是彩绘陶器,因为它们更容易分类
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- So this is where recursion gets a little trippy-- certainly initially, and that you have to kind of keep diving deeper, deeper, deeper into the problem.
在这儿就会觉得递归有点迷糊了-,起初，你必须一层一层地,深入到问题中。
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When someone gets a gift and the other people at the kibbutz say, "Well you can't have that by yourself, we share everything."
当某人收到一件礼物,农场里的其他人就指责道，你不能把它据为己有，我们必须分享一切“
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And if you're going to have a port, then you have to have a navy.
如果你有了港口,那你就必须有一支海军
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You'd have to sort of start it up again, retrain again.
你就必须重新建立这种联结，重新培训。
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Otherwise you're going to waste some of that heat somewhere along the way, some of energy.
否则你就必须在这个过程中,浪费一些热量。
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So realize you don't have to get it right the first time, but you have to listen and watch to what actually those problems are and that is one of the roles your teaching fellows play.
请认识到，并不是要你第一次就把事情搞对，但是你必须听听，看看,问题是到底什么，这也是你们的助教,扮演的一个角色。
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If you buy a house and you don't pay the mortgage, the contract says you lose the house-- you're out--you've got to pay or it goes back to the mortgage originator.
如果你抵押贷款买房,却没有还房贷,贷款合同规定,你将被取消赎回权,失去房子,所以你必须偿还贷款,否则你的原始贷款人就会收回房子
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If you are a public company, the important thing is you have to do all of the disclosure that Louis Brandeis would have liked; you have to file regular forms with the SEC, disclosing information.
作为一家上市公司,你必须公布所有必要信息,就像是路易斯·布兰代斯曾希望的那样,你必须定期向证交会上交文件,披露公司的信息
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You might think, given all this, and given the ultimate plot of On the Road, that being on the road is about pursuing that kind of desire, and that it is necessitated by leaving home: you have to leave home in order to pursue that desire.
你们可能觉得，所有这些，以及《在路上》的最终情节，关于在路上就是追寻这种渴望，这就使离家成为必需：,你必须得离开家才能追求那渴望。
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