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So if you wanna do something conditionally, you generally needs to ask the question, is the following true or false.
假如想在一定条件下做一件事情，你需要判断下这个条件，来看看条件是真还是假。
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What do you need to get into college in the UK?
在英国上大学需要有什么条件？
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You handle them very special in terms of being extra careful in a very high ventilation area, in hoods is how you handle them.
在使用它们的时候你需要格外小心,必须在通风条件非常好的地方，在通风柜中才行。
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But it's possible,I suggested, that we really shouldn't focus on the question, what does it take for me to survive?
但我认为，很可能，那根本不是我们应该重视的问题，比起讨论我要存活下去需要什么条件？
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And you will form a crystal of sodium chloride as a result of this need to form crystal expressed through the Coulomb's Law.
你能得到氯化钠晶体,因此，形成晶体所需要的条件,在库伦定律中通篇都有表达。
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It's asking a lot to get to 1 here, and in fact, we didn't get to 1.
需要很多条件才能使最终结果是1的,实际上这个游戏一直都没有到1
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You need to train a pig and you need to do so through operant conditioning.
你需要运用操作性条件作用来训练一头猪。
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So, marginal land is brought into play with hard work and ingenuity, and this is one of the things that Hanson emphasizes that is so helpful.
那么,边际耕地需要,在一定的生产条件下,生产收益正好足以补偿所需费用的土地,这就是汉森所强调的相当有益的一点
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I need a so-called base case even in my analysis here.
在分析过程中我需要一个所谓的基本条件。
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So I've got a function to maximize and a constraint that must be obeyed.
一个需要得到最大值的函数,和一个需要遵守的约束条件。
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In other words, we need criteria for equilibrium under more general conditions than the ones that we've dealt with so far, than the one set of conditions that we've dealt with so far, which is isolated system.
换句话说,相比我们目前为止,考虑和处理的问题，我们需要更一般条件下平衡的判据,我们目前，只考虑了孤立系统。
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We need to throw in an extra clause to deal with branching, splitting cases,of the sort that I've just been talking about.
我们需要加一个额外条件，来处理我们上述的分歧案例。
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I take a look at the second derivative, which is the second order condition.
我需要求出二阶导数,即需要寻找二阶条件
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And so, what we'd like to know is what does it take for two person stages to make up or be part of the very same extended-through-time person?
所以我们要知道,两个人生阶段,要成为同一个贯穿空间的人的,一部分，需要什么条件？
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Right, so to get all the way, good, so to get all the way, thank you So to get all the way to 1, we need a lot.
没错,所以这样一来,很好,所以这样一来,谢谢你,要让平均数到1需要很多条件的
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And so if you are a bit of a geek and would like to play net/aces with this you can go to cs50.net/aces and I don't think Willie will give it to you to keep but you can borrow and play for some amount of time in exchange for some feedback on it.
所以，如果你有兴趣并想玩玩这个,那么你可以访问cs50。,但是我觉得Willie不会让你保管它,你可以去借，然后玩一段时间，但作为交换条件,你需要反馈一些意见。
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We can't answer that question until we are clearer about what does it take to have identity across time.
我们无法回答那个问题,除非我们知道,人格要穿越时间需要什么条件。
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It predicts that the best timing is when the conditioned stimulus, which is the signal, comes before the unconditioned stimulus, which is what you have to prepare for.
它预测，最佳的时机,莫过于作为信号的条件刺激，出现在需要你做准备的，非条件刺激之前。
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I actually need to check the second order condition.
实际上我们还需要验证二阶条件
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What makes it true that the person lecturing to you next Tuesday is Shelly Kagan, the very same person, what makes that true is that it's the very same soul.
那个下星期二给你讲课的,还是谢利·凯根,和现在是同一个人，所需要的条件是,有同一个灵魂。
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We want to have that definition clear because in fact we're going to, we might want tabulate heats of reaction, right, and of course want to know what the conditions are for the tabulated values apply. And we're going to want to calculate them from other quantities and again, we're going to need to know each case what are the relevant conditions?
我们想要明确这个定义,因为实际上我们会想把,反应热制成表格，当然我们会,想知道表中的数据在什么样的,条件下是有效的，我们会,想要从其他的量中算出它们,再一次，我们需要知道,每种情形下相关的条件是什么？
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As an aside, if you ever just have one line of code that you want to execute, one puzzle piece in Scratch terminology, ; you actually don't need the curly braces; you only need the curly braces if you have two or more lines of code that you want to execute if that condition is true.
此外，如果你只有一行代码,需要执行，在Scratch，术语中叫做,一句代码，你就不需要使用花括号了;,如果那个条件成立，你有两行或更多行的代码时需要执行时,你就需要花括号。
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