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In the weekly Republican message, Bond said the American people have a right to know where the detainees are going.
VOA: standard.2009.05.09
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He said that the percent ionic character, and this is within a bond, not for a compound, for a covalent bond.
他提到离子百分数，是指一根键中，并非一个分子中。
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In contrast, the dissociation energy of a bond for hydrogen, and molecular hydrogen is everywhere around us, we see 432 kilojoules per mole.
相反，氢分子在我们周围到处都是，一个氢分子的离解能，是432千焦每摩尔。
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Those without retirement plans can check a box on their tax returns to get their refunds as a savings bond.
VOA: standard.2009.09.05
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I mean, hypothetically a bond trading at $.60 on the dollar with an 8% coupon, five-year bond that's yielding about 18%.
我的意思是，假设一种债券以0。60美元进行交易,同时有8%的票息，五年期债券收益率在18%左右。
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And ultimately we are going to get to this state where we are going to form a bond.
最终我们将得到这个状态,即形成一根键。
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In our investing experiment that it was come with a puisne at Northwestern, she's now an assistent professor there people saw 3 options, two Stocks and a Bond.
在我们的投资试验中,试验是在西北大学一名晚辈的帮助下完成的，她现在是助理教授,受试者会看到三个选择，其中两个是股票，一个是债券。
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Now when Black Boy was published there was a war bond advertisement on the back cover of the book.
当《黑孩子》出版时,战争债券的广告是附在书后的。
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So what I want to point out is that it creates an effect that is exactly opposite of a bond.
我要指出的是,它造成的效果和成键正好相反。
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It's much more relevant to set our zero point energy as the separation of a bond in terms of talking about the reactions that we'll usually be dealing with here.
更好的是把零点能定在,键断裂的时刻,在讨论化学反应的时候,而我们以后将经常遇到化学反应。
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So what we see is a bond order of 0, and again, the bond is very, very weak.
我们看到键序是0，同样的，键非常非常的弱。
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So, if a bond was issued when interest rates were lower, they might have a 4% coupon when the prevailing rate is 6%.
所以，如果一只债券在利率很低的时候发行，在汇率为6%的的时候，它们可能有一个4%的票息。
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And this turns out to have a bond strength of 435 kilojoules per mole.
这证明有每摩尔435焦的,的共价能。
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I may have an "IOU" From someone or I may own a bond from someone that promises to pay me something in a year or two years.
也许我握有一份欠条,或是一份合约,某人承诺,在一年或者两年内支付我一些钱
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So, let's talk about a bond.
下面,我们来讨论一下长期债券
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So we want to have constructive interference to form a bond, where as if we had destructive interference, we would not be forming a bond.
我们需要,相干相长来成键，如果，相干相消了，就不能成键，所以这时候。
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So the way that you describe a bond is you describe the orbitals that the bond comes from, and also the symmetry of the bond.
描述一个键的办法,是描述形成键的轨道，以及键的对称性。
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Because if we think about wave behavior of electrons and we're forming bonds, then what we have to do is have constructive interference of 2 different electrons, right, to form a bond, we want to and together those probabilities.
如果我们考虑,电子的波动行为,并且，我们要成键的话,我们要,把，这些概率，加在一起,如果。
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So for the bond order we want to take 1/2 of the total number of bonding electrons, so that's going to be 4 minus anti-bonding is 4, so we end up getting a bond order that's equal to 0.
键序等于1/2乘以,总的成键电子数，也就是4，减去反键电子数，也就是4。,所以最后得到键序为0。
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So we know every time we have two electrons, that's a bond.
我们知道每当我们有两个电子，这就是一个键。
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So what we're predicting is a bond angle of 90 degrees.
垂直的轨道上。
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What kind of a bond is a bond order of 1?
什么样的键键序是1？
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So we'll predict, yes, there's a bond here.
所以我们会预测，啊，这里有个键。
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So if we have a single bond here, would you consider that a sigma bond or a pi bond?
如果这里有个单键，你觉得这是sigma键还是π键？
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Now, you have to understand that when you buy a bond, if you buy it at issue, you get the first coupon in six months, the second coupon in one year, the third coupon in eighteen months, and the last coupon you get at the maturity date.
你们需要了解,如果在发行时就购入债券,六个月后会得到第一笔票息,一年后第二笔,18个月后第三笔,到期时得到最后一笔票息
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These 2 are going to come together like this, and the first bond that we're going to form is going to be a sigma bond, right, so we see that here. If we're looking head on, we see they form a sigma bond.
它们两个会靠近到一起，首先会形成的是,一个sigma键，对吧，我们在这里可以看出来，我们看到它们形成一个sigma键。
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So in the first case of this first bond here that I've put in a square, what type of a bond is this, is the sigma or pi?
在这第一个键里,我用方框把它标出来了，这个键是什么类型的，sigma还是π？
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So it has a bond, there's no bond in h e 2.
所以在He2里没有键。
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So, when we think about a bond length, this is going to be the length of our bond here, that makes sense because it's going to want to be at that distance that minimizes the energy.
因此，当我们考虑一个键的长度的时候，这就应该是我们的键长，这是合理的,因为体系会在核间距达到这一距离时,能量到达最小值。
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So if you think about any one of these carbon-carbon bonds, what type of a bond would you expect that to be?
如果你们考虑任何一个碳碳键，它是什么类型的？
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