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if you've got a hill or valley and there's a cart on wheels it's going to go down to the bottom.
如果我们有一座山或者山谷，并且,有一个有轮子的车，这辆车会自动滑到底部。
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If they don't have any tables or we don't like what's on the menu,
如果他们没有空位，或者我们不喜欢菜单里提供的食物，
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We can never just have it there before us or, as I say, if we can--if we can--it's a very, very difficult act of concentration.
我们永远不能只面对着它，或者，要我来说，如果我们可以的话，那将需要高度集中注意力，这是很难的。
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So let's take two cases of shielding if we're talking about, for example, the helium, a helium nucleus or a helium atom.
所以我们来对屏蔽举两个例子,如果我们在讨论氦，举例来说一个氦原子核或者氦原子。
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Or, if we know the equation of state from a model, ideal gas, van der Waal's gas, whatever, u now we can determine u.
或者如果我们知道模型的状态方程,比如理想气体，范德瓦尔斯气体，无论什么，我们就可以利用状态方程得到内能。
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And yet if a computer can only count up to 2 billion or maybe 4 billion, I mean, what do you then do?
如果一台计算机只能够支持20亿,或者40亿，那我们该怎么办？
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And we know that Down does best if I think it was equally likely that the person was going to choose Left and Right.
我们还知道如果我们认为对手,选左或者是右的可能性相同的情况下,下是此情况下最好的策略
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Nowadays we know if you go into the neutron or the proton, there are quarks.
如今我们知道,如果进入中子或者质子内部,就会发现夸克
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That car stage or that car slice if we want to talk about that way it has only been around for however long months, years, a year.
那辆车的阶段或者部分,如果我们非要分析的话,只能持续很短时间,几个月，几年，或者一年。
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For example he employer may have said verbally or suggested to an employee that if you do well we'll promote you up and you will have various advantages in the future.
例如，也许雇主向雇员口头上说过,或者建议过，如果你工作努力,我们将提升你的职位,并且在将来你会有很多的优势。
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All right, we're-- well actually, I should say that better, we first check to see, is x 0 greater than or equal to zero, if it's not, then we come down here and we print something out, otherwise we run through a little loop to get the answer, and then we check it and we spit something out.
然后我们运行一个小循环,好了，我们现在来看看,如果x≥0或者x＜,我们看这儿,我们会输出一些内容,或者我们运行一个小循环来获取答案,然后我们检验一下，然后得到结果。
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If you take a look at the last day, or the day before, you will see that we talked about average valence electron energy.
如果你注意到昨天或者前天的事，你将看到,我们讨论的是平均价电子能。
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Further down the line here, if we looked in the adult brain or spinal cord and other regions we'd find committed progenitor cells.
沿着这条线再往后,如果我们看看成人的大脑,或者脊髓或者其他部位,我们就能找到定向祖细胞
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Or if we don't appreciate it, wither and die.
或者，如果我们看不到这潜能，它就会像刚萌芽的幼苗一样被扼杀，it，will，depreciate—
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So, let's go ahead and make sure we can draw that, if we have interest either in the area of organic chemistry or biochemistry or biology here.
那么，让我们来确认一下我们已经学会怎么画了，如果我们对有机化学,生物化学或者生物学中的任何一个领域感兴趣的话。
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There's a kind of aspect of value for many of us where we feel that something's especially valuable if it won't endure, if it's fragile, or if it's rare.
对我们许多人来说，有一种价值的方面在于,如果某事物不是持续的，如果是易碎的,或者是稀有的，我们就觉得它特别有价值。
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1 Similarly, if m is equal to either plus 1 or minus 1, py we would in turn call it the p y orbital, or the p x orbital.
类似的，如果m等于+1或，我们可以叫它，或者px轨道。
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So we're going to call this the sigma 2 p x star, or if we're talking about the 2 p y orbitals we'll call this the pi 2 p x star, and the pi 2 p y star.
我们叫这个sigma2px星，或者如果我们说的是π2py轨道的话,我们叫这个2px星，这个π2py星。
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Or if we look at how strong it is, it's actually stronger than a single bond, but weaker than a double bond.
或者如果我们看键的强度的话，它实际上比单键更强，而比双键更弱。
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And the motivation for choosing a pair like that is easy to see, if we look at our condition for spontaneous change or general condition.
我们这样选择的动机,很明显，如果考察我们所考虑的自发变化的条件,或者更一般的条件。
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So now we're comparing my choosing 1, when my opponent chooses 2, and the payoff I would get if I choose 2 when my opponent chooses 2.
当我选择立场1,而对手选择立场2时,或者如果我们都选择立场2,我的收益会是怎么样的
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What about that case? Well, I think if we were doing a matter of physics, as it posed to--sort of psychology Psychologically we understand why, losing weight might make a real difference about how you feel about yourself.
这个案例该如何解释，我认为，如果我们在研究物理问题，或者，心理学问题,从心理学的角度我们明白原因，减肥可以让你,自己感觉非常不一样。
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And if we talk about electrons or photoelectrons, again we can describe it in terms of energy, we can talk about velocity, and from there, of course, you can figure out the energy from 1/2 m v squared, and actually we can also describe the electron in terms of wavelength.
如果我们谈论电子或者光电子，我们又可以从能量的角度来描述它，我们可讨论速率，从那里，当然，你可以计算1/2，m，v2得出能量值，而且事实上我们也可以,从波长的角度来描述电子。
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-- Else if n is greater than 4 and n is less than 6 -- 7 let's call it medium -- else if n is greater than or equal to 7, -- less than or equal to 10 -- let's call it "big" -- and if the user typed in zero or negative 10 or 20 or whatever, let's just use the all-inclusive else block and just say, "You picked an invalid number."
否则如果n大于4，并且n小于-,我们叫它为中间数--否则如果n大于等于，小于等于10--我们叫它为“大数“,如果用户键入了0或者-10或20或其它的，让我们用一个广泛的else子句，只需要说，“你选了一个非法的数字“
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So again if we look at this in terms of its physical interpretation or probability density, what we need to do is square the wave function.
如果我们从物理意义或者,概率密度的角度来看这个问题，我们需要把波函数平方。
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px We'll call it either pi 2 p x, 2py if we're combining the x orbitals, or pi 2 p y.
我们叫它π,如果是x轨道组合的话，或者π
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So if we were management consultants working for Mckinsey or something, and we were brought in to advise you on your homework assignments, or this law partnership on their work practices, we would come down with a prediction that this is how much work you're going to get.
如果我们是麦肯锡公司的管理顾问,或者给你们的作业提出点好的建议,或者对于现实中的律师事务所,我们都能够预测出来,你可能会投入多少工作量
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We live in a gravitational field and that it affects our day to day life, and if you have hip pain or a hip that's diseased in some way, and you can't stand up against that gravitational field in the same way, that severely limits what you can do in the world.
我们生活在一个重力场中,这个场影响着我们的日常生活,如果你的髋关节疼痛,或者有其他髋关节疾病的话,就不能像平常一样,站在这个重力场中了,这严重限制了人的活动能力
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