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Right, having done that, we can certainly get to more complicated things, so for example, suppose I look at that expression.
好，说完了这一点，我们就可以讲些复杂些的话题了，例如，假设我看到了这个表达式。
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If I charged the reactor in this manner, and of course I'm assuming 100% completion of the reaction which we know is overly optimistic.
如果我们这样来考虑这个反应的前提，就是我们假设,反应完全进行,我们知道这有些过于乐观了。
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Suppose you could build a circuit with the following property: the input to this circuit would be any other circuit diagram.
假设你能用如下物品,建立起一个线路：,这个线路的输入设备,可以是任意一个其他线路的流程。
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Similarly,suppose we thought that the body view was the correct view and we imagine, again,some sort of case of complete amnesia.
同样的，假设肉体理论是正确的，我们再次想象这个完全失忆的案例。
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We're making a lot of very strong assumptions here, but nevertheless, it's going to be instructive to look at this model.
我们做了很多强制性的假设,但无论怎样,这个模型对我们仍然具有指导意义
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Suppose the planet were hit by a comet-- this happened--something like this happened sixty-five million years ago, so it could happen again.
假设这个星球被一颗彗星击中-,这样的事，大约六千五百万年前,发生过，所以它还可能再发生。
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And you can amuse yourself as you're driving along, saying, "Well, that guy from Chateauroux is off to visit his cousin in Besancon."
假设你自己正一个人开车行驶,这个来自沙特路的人要去探望在贝桑松的表兄
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So that way you can have an idea if, oh, I do really understand this but I'm a little bit slow, maybe I need to practice this one type of problem a little bit longer so I can get up to speed so I'm going to be able to get through all this in terms of the exam time.
这样你就可以知道，假设，噢，我真的懂这个，但是我的速度有点慢，或许我需要在练习这个类型的题目上,多花一点时间,这样我就可以提高自己的速度,可以全部做完,在考试规定的时间内。
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Supposing this--we mentioned this also, this idea--supposing we had other things kind of running around there.
想象一下吧，我们以前也提到过，这个想法，假设我们还有别的东西在哪里进行。
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We'll talk more about promoters as they go on, for now let's just assume that we have a promoter that works in this particular cell.
我们以后还会谈到更多有关启动子的知识,而现在就假设这个,特定的宿主细胞里有个启动子
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But before telling you about this let me sort of Go through some of the hypothesis that we have and That we are now testing about why the subject is Difficult and why these materials assembled what We have assembled them might be useful.
但是谈那之前我要说说,我们之前的一些假设,我们现在正在测试为什么这个学科很难,以及为什么我们整合这些资料是有用的,我们认为把它们整合起来或许有用。
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So supposed that this one-- I'll just guesstimate, this one feels heavier.
假设是这个--我只是瞎猜，这个貌似重一些。
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Suppose the particle is not moving in a circle, but does this.
假设这个质点不是做圆周运动,而是这样
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Well, what you're looking like presumably is this .
很好，就想你们看起来的样子,假设是这个，指着幻灯片。
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What I am going to do is use these postulates and go through the basis for the Bohr model.
接下来我要利用这个假设,检查波尔模型的根据。
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And the obvious question I could start with is, and suppose I ask you, how long does the algorithm implemented by this program take to run?
我开始这个话题的第一个问题是，假设我问你，由这个算法实现的程序大概,要运行多久才能给出答案？
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Again, same kind of reasoning says, given some value x, I happened to pick a small one here, what's an easy way to do this? Well, let's just start at one. That's my variable I'm going to change and check.
好，尤其是，让我们到这里来,让我给大家看看第二个例子,让我把这个注释掉，这是我要解决的，第二个问题，假设我想找到一些整数的,所有除数，我想要找出来这个数的所有的除数。
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Now we're going to make an assumption today and for the next ten weeks or so; so for almost all the class.
现在我们不妨作一个假设,这个假设在接下来的十多周都要用到,差不多是整个课程都要用到
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This is a special case, though, because I've assumed that the assets are independent of each other, which isn't usually the case.
这是一个特例，因为我假设了,这个投资组合里的资产是相互独立的，但现实中通常都不是这样的。
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Haven't I taken back the assumption that in order to believe it, you've got to be able to picture it? Not quite.
我不就是放弃了不能相信无法想象的东西，这个假设吗，其实不然。
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The second assumption we're going to make which is new is that we're going to assume that candidates cannot choose their position.
我们给出的第二个假设,这个新的假设是,候选人不能选择他们的位置
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Now,in posing this question,I'm obviously presupposing that we can draw a distinction between the question,Do I survive?
提出这个问题的时候我显然已经假设,我们能够分清，我是否生存？
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Now, in the posing the question that way, I've been assuming that these are things you'd do despite the fact that they run the risk of death.
现在，以这种方式提出了这个问题，我已经假设了存在尽管带有死亡的风险,但你仍会去做的事情。
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OK, once it gets to the end of that, what's it going to do? It's going to come down here and, oh. What's that doing? Well I cheated when I started. I said, somebody's giving me a perfect square, I'm looking for the square root of it. But suppose 15 I gave this thing 15, and asked it to run.
好，一旦到了循环的最后，程序会去做什么？程序会跳到这里来,噢，这是干什么的？好吧,当我开始的时候我有点小作弊的意思,我说过，我得到了一个完美的平方数,我要求这个数的平方根,但是假设下我得到的数是。
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The total energy of the system, which we are going to get from postulate number four, which says the energy of the electron, which is the energy of the system, is the sum of the kinetic and the potential energy.
这个系统的总能量，也就是我们将从第四个假设中算出的能量，也就是电子运动产生的能量，也就是整个系统的能量，是动能和位能的总和。
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And suppose now this game came along in your line of work and you'd chosen up.
假设你在工作中遇到了这个博弈,你选择了上
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How would you model individual stocks if you believe this hypothesis?
如果你们相信这个,假设你们应该怎样去对每只股票建模呢？
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Now,it turns out that that assumption, standardly built into the usual label,may be false.
现在似乎在通常标签下建立的，这个假设本身就是错误的。
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The assumption we're going to change is the idea that products are identical.
我们要改变的是,产品是一样的,这个假设
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We're going to assume that consumers are evenly spread along this city.
我们假设,消费者均匀分布在这个城市中
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