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The Smithsonian's National Museum of American History in Washington,D.C., has one of the oldest known pairs of Levi's jeans in its collection.
VOA: special.2009.12.18
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So oxygen gets 3 pairs, and each chlorine gets 3 pairs, so now we're up to 9 pairs.
那么氧都有三对，每个氯有三对，那么现在我们用了九对了。
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And even here at the law school, we wrote papers in pairs and as groups.
就算在法学院，我们也是成对和分组写论文的。
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They can also see some of the things he used in his magic tricks, including a straitjacket and eleven pairs of handcuffs.
VOA: special.2010.12.17
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Well, we're talking about a pretty high number here, so to make counting easier, we'll just say 10 lone pairs, because 20 lone pair electrons is the same thing as 10 lone pairs.
好吧，我们这里讨论的是一个挺大的数，为了数起来更容易，我们就说有十对孤对电子，因为二十个跟十对是一个意思。
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Paul then took a taxi to another shop where he bought several pairs of leather shoes and boots.
VOA: special.2009.04.11
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And then it says, OK, distribute the remaining electrons in pairs so that each atom has eight.
然后它说，接下来将剩下的电子成对排布,使每个原子都有8个电子。
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Scientists found the tropicalis genome contains more than one-point-seven-billion chemical bases along ten pairs of chromosomes.
VOA: special.2010.06.29
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That means the gene that encodes insulin, the sequence of base pairs that encode insulin.
这意味着基因编码了胰岛素,碱基序列编码了胰岛素
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And still there would be enough left for new stockings two pairs per child.
VOA: special.2009.09.05
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And then the number of pairs at month n is the number of pairs at month n - 1 plus the number of pairs at month n - 2.
我们让第一个月的兔子数是1对,第n个月的兔子对数,是第n-1个月的兔子对数。
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A potato has twelve chromosomes and about eight hundred forty million base pairs.
VOA: special.2009.11.03
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so I really learned to enjoy working in pairs and with my classmates.
所以我真的喜欢上了跟我的同学两人合作。
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There are four categories of figure skating: men's singles,women's singles, pairs,and ice dancing.
VOA: special.2010.02.10
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If an impure object--and you will see here these overlapping pairs, if you can imagine the lower pair sort of being plunked down on top of this pair, that will give you an idea of what we're trying to convey with this image.
如果一个不纯洁的东西--看这里，这些重叠的单词，假设这两个单词,突然跑到这两个的上面，这样你就会对我们这个图示想传达的内容有个概念。
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The panda genome has about two billion five hundred million base pairs.
VOA: special.2010.01.19
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I have more than one hundred pairs of shoes.
我有100多双鞋。
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And its warming,you know." Down the street, Mary Ellen also pairs love with warmth, especially in its liquid form.
VOA: standard.2010.02.13
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The special sound of Frost's poems result from the tensions between these pairs of opposing forces as they are embodied in his language.
这种诗歌的特别声音来自这种紧张,这种反抗力量之间的紧张,都在他的诗歌中得到体现。
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The sewing machines are quiet now, but soon the owners hope, 3,000 pairs of boots a day will be produced here.
VOA: standard.2010.07.06
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And it turns out that it's actually less than 109 . 5, because those lone pairs are pushing the bonds even further away.
所以结果是它要小于109。,因为孤对会把成键推向更远。
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PROFESSOR: Good, good, it's going to be less than, and it's going to be less than because now we have two lone pairs.
教授：很好，它要更小,因为我们现在有两个孤对。
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We see three bonding pairs so this is a triple bond, indeed a multiple bond.
我们看到3对成键电子所以这是一个三重键，它确实是多重键。
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And then we have a triple bond there because we have 3 pairs of electrons.
然后那里还有一个三键,因为我们有三对电子。
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Place the non-bonding pairs on peripheral atoms first, which the higher average valence electron energy.
首先将孤对电子放在外围的原子，那儿具有较高的平均价电子能。
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If it were linear, which 32% of you seem have thought, that would have meant that our Lewis structure had no lone pairs in it, right, and that's not the case.
如果是直线，就像32%的同学认为的那样，这意味着Lewis结构里没有孤对,对吧，这是不可能的。
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I have shown that by taking Avogadro's number of individual ion pairs and putting them all together in a line, the system's energy became more negative.
我推导出了,从每一个离子对中抽出阿伏加德罗常数,再把它们放在一起在一列中，这个系统的能量就变得更负。
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And step seven is how many electrons do we have left over that are going to go into lone pairs? How many?
而第七步是我们剩下,多少电子成为孤对电子？多少？
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We let the number of pairs at month 1 be 1.
实际上不是应该是1。
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That's because every three base pairs describes an amino acid in a protein.
那是因为每三个碱基对,对应一个蛋白质中的一个氨基酸
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