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So that means that if we have three orbitals, we can only have six electrons in those complete three orbitals.
所以那意味着如果我们有3个轨道，我们有且只能有6个电子,在这3个完整的轨道。
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And we do two to three concerts per year. We have two rehearsals a week.
我们每年举行二到三次音乐会。每周练习两次。
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It's about the four-dollar cup of coffee that we have three times a day, because we need to keep the feel going.
可能只是节省一杯4美元的咖啡,我们每天要喝三次咖啡，只是为了留住这种感觉。
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We're already using it up in this pi bond here, so that means we're limited to only two other spots on the molecule, so we have three.
我们已经把它用到这个π键里去了，所以这意味着,我们在分子里只剩下两个位置，所以一共是三个。
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I'm not working alone here, but we have three teaching fellows who are affiliated with the course, two of which are here today.
我并不是一个人讲授这门课,有三位助教,与我并肩战斗,今天有两位在这里
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In fact, I have it--suppose we have three assets and we want to compute the efficient portfolio frontier, the mean and variance of the portfolio.
事实上，假如我们拥有三种资产,我们想计算有效边界，及投资组合的均值和方差。
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Well they're not necessarily, because we only have the number three player in terms of size.
其实不是的,我们在规模上只能排到第三
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Now going from three to four right, so we have another isothermal process for an ideal gas, so I won't try to make you sing again so soon.
从第三点到第四点，这也是一个理想气体的,恒温过程，这次不用你们集体回答了。
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We have to decide three things: one, the name of the function.
我们必须决定三个事情：一，函数名。
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These units we call bars or measures and just to finish this off down here we would have three quarter notes of course, in this particular arrangement.
这些单元我们称之为小节,我们来把接下来的写完,这里我们有三个四分音符,当然,按照特定的安排
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We're going to talk in a minute about those three sections, so you want to have that handy.
我们将用一分钟的时间讲这三大部分，所以你们要快点找出那张讲义。
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What I'd like to do is really about three things in this brief time we have together.
在这段短暂的时间里,我想谈论三方面内容。
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We have to add it all up so it's not just numbers, three against one; it's also all of those people at home.
得把这些加起来考虑,所以就不只是这个数字，三比一;,还要加上这三人的家人。
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We have the movie we are going to watch is nighty-three minutes, I think.
我们有部电影，我们将要看那部电影,我想应该是九十三分钟长。
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Huge, and one of the things that I argue in this book and also in the Princeton Projiect on National Security which I co-directed with John Ikenberry over the last three years is we have been singel-mindedly focused on the war on terror.
很大，我在这本书中试图说明一点,在普林斯顿国家安全项目中也试着强调,这一项目在过去3年内由我和约翰伊肯伯里共同负责,那就是我们仅仅盯在了一点上,我们盯着恐怖主义战争不放。
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We have like two months, about three weeks of sun and then it's finished.
我们有两个月，大概三个星期的晴天，然后夏天就结束了。
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And in this case we have three choices here in terms of what's going to be in the middle, so we need to decide that first.
而这种情况下对于哪个原子,在中间我们有三种选择，这是我们首先要确定的。
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That's what we call when we have three bonding atoms and one lone pair.
这是当我们有3个成键电子,和一个孤对时这样称它。
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So there's two different orbitals that can have these three quantum numbers, but if we're talking about electrons, we can also talk about m sub s, so if we have two orbitals, how many electrons can we have total?
所以有两个轨道可以有,这三个量子数，但如果我们讲的是电子，我们还要考虑ｍ小标ｓ,如果我们有两个轨道，一共有多少个电子呢？
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So what we'll have here is a trigonal planar case, and you can see that we only have three electrons that are set for bonding, so we'll add three hydrogens, and for b h 3, we'll get a stable structure here.
让电子劲量远离的时候，不用考虑它,这个例子是平面三角形，你可以看到，只有3个电子可以成键。
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