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And, a lot of the derivations you will see in physics rely on this being able to model as point charges.
然后，你在物理学中看到的许多东西,都是靠以点电荷为模型得到的。
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and I live with this very nice girl, my roommate who writes plays for a living and works at a theater.
我和一个女孩一起住，她人很好，在剧院工作，靠写戏剧为生，
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All of the sounds are produced by the strings on the instrument and how the bow is pulled across the instrument.
所有声音都是靠乐器上的弦产生的,琴弓在乐器上来回滑动发声
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The reason that there is increased electron density here is you can see that these two orbitals come together and constructively interfere.
你们可以看到两个轨道,靠在一起相长叠加,这就是为什么中间的电子态密度增加了。
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So suppose,gruesome as it was,this weekend I'm in some horrible accident and my torso gets destroyed and they keep my brain on life support, oxygenating it just long enough to do some radical surgery into some spare torsos.
来做个可怕的假设，我在周末惨遭事故,肉体完全损坏，只剩大脑靠系统维持生命，持续补氧到能被高超手术植入另外的身体。
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if he goes down there, I might sort of bum along for a couple of months and live off with him
如果他真的到了那里，我可能会在那里安逸地住上几个月，靠他生活。
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But when you have many page views and that many people spending much time on the site, you can monetize it pretty easily just by putting matters on there.
当拥有那么大的访问量,当人们花大把时间在你的网站上时，仅靠投放广告,就能轻松赚钱。
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We'll come back to that much later in the course.
我们在这门课靠后的章节里会讲到这一点。
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So I am basically living off my savings in this country to study, this time around.
所以这次在这里学习，基本上是靠我的积蓄过活，
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But I had family in the New York area, and I wanted to be closer to them, and I wanted to give my daughters the opportunity for a multicultural community environment.
但我在纽约地区有家人，我想靠他们近一些，而且想让我的女儿们有机会,融入多元群体的环境中。
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So, this is what goes on in an electrolysis cell, and it works thanks to input energy from a power supply shown here.
所以，这是在一个电化学电池中发生的，它是靠输入的能量工作的,从和这个类似的电源输出的能量。
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All right? I mean, I can make money at Harvard Square doing this stuff, right?
对不对？【鼓掌】我意思是，我可以在哈佛广场,靠做这个赚钱对不对？
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From here on down, if I bothered to do it, we'd find that choosing 3 always gets me 5% more of the vote than I would have had from choosing 2, against any of these higher numbers.
如果我不怕麻烦 我能一直这么写下去,我们发现选择立场3总是比选择立场2,使我多获得5%的选票,在对手选更靠后的立场的情况下
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One of them, played by Orson Welles, is in a black market racket in Vienna and is making a living doing something very bad in the black market.
其中由，Orson，Welles，扮演的，一位活跃于维也纳的黑市勾当,生计主要是靠在黑市中,从事非常卑鄙的交易。
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But abruptly, fiendishly, the tender pattern of nudity I had adored would be transformed into the disgusting lamp-lit bare arm of a man in his underclothes reading his paper by the open window in the hot, damp, hopeless summer night.
然而突然，糟糕得很，我崇拜的那副美好的裸体,投入了台灯下一双男人赤膊的肩膀，他穿着内衣裤,读着报纸，靠在敞开的窗边，沉浸在,炎热，潮湿，绝望的夏夜里。
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So let's do a quick clicker question, and you tell me how many valence electrons does fluorine have? Remember, valence electrons are different from core, they're only the outer-most electrons in the outer-most shell.
那么让我们来做一个小选择题，请大家来告诉我,氟有多少个价电子，要记得，价电子与芯电子不同，它们是在最外壳层的最靠外面的电子。
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So that's something to think about.The closer these pitches are together, the more likely they are to be dissonant--and the desire to have some space added there.
所以想一想，这些音靠的越近就越容易不和谐，让人想在其中嵌入一些空间。
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The image here that comes to mind for me is one of these deposed kings who ends up waiting on tables to make a living in New York.
我此刻想到的一幅景象,便是一位被废黜的国王,沦落到要在纽约靠当侍应生谋生的结局。
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that's one way to think about it, and there's also another way, and this is the way that your book presents it. If you, in fact, have two of the same atom right next to each other, let's say you have a crystal, or let's say you're talking about a metal, what you can do is just look at the distance between the two nuclei, and split that in 1/2, and take the atomic radius that way.
这只是一种定义的思路，另外还有其它方法，也就是你们课本上的方法，如果你，事实上，有两个相同的原子彼此靠在一起，比如说你有一个晶体，或者说你讨论的是一个金属，你所要做的就是,看看这两个原子核之间的距离，然后将距离除以二，就得到了这个原子的半径。
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