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That's very nice. So basically, you get a lot of benefit supposedly from this 7-Up soda from the 1920's or so.
这非常好，因此基本上，在二十世纪二十年代,喝到这样的七喜恐怕对你大有好处。
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It's nice to be around a lot of young people. There's a lot of people in their twenties,
我很喜欢周围有许多年轻人。这儿很多人只有二十来岁。
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Because it takes three units where there's only four choices at each position to have at least 20 unique combinations.
因为每个位点上仅有四种可能性,只有采用三个碱基一组,才能取得至少二十种不同的组合方式
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So, we have this security and a ten-year bond would have twenty coupons attached, each with a date on them.
我们持有这样的证券，是十年期的债券,并附有二十张息票，每一个都有日期在上面。
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So, we know this point at one second is 20 meters, so let's just ask one other question and we'll stop.
我们知道该物体上升一秒后到达二十米处,关于这个模型的最后一个问题
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Because it was in the 1950's or so, maybe the late 1940's, that people started to discover lithium, even though it had no natural function, it did do something in our bodies.
因为在二十世纪五十年代左右，可能是四十年代末期，人们开始发现锂，尽管不参与人体的正常生理活动，但是它确实会对我们的身体产生影响。
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An old crony and former colleague of mine was taking a course at Johns Hopkins in the 1960s.
我的一个老朋友也是我的大学同学,二十世纪六十年代的时候在约翰斯，霍普金斯大学上学。
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Some of those kids will need coronary bypass surgery in their twenties; some of them will be blind by the time they're thirty.
这些孩子有的要在二十多岁时,做冠状动脉搭桥手术,有些人在三十岁的时候会失明
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I refused a girl 20-years-old at $700.00 yesterday," one trader wrote to another in 1853.
昨天我拒绝了一个,开价七百美金的二十岁姑娘",1853年一个交易商,在给另一个的书信中写道
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There was, in the 1930s, a psychologist who tried to address this second question.
二十世纪三十年代，有位心理学家试图解决第二个问题。
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Typically, the youngest guys are twenty, and typically the oldest guys are 45, but everybody was liable to military service in these states until they were about 60.
一般来说,最年轻的二十岁,最年长的四十五岁,但是在有些城邦中,六十岁以下的人都能参军
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These are spelled out in Leviticus 18 and Leviticus 20, those two chapters. Besides defiling the sinner, moral impurity symbolically defiles various sancta, especially the sanctuary, but also God's name and also the Holy Land itself.
这些都在《利未记》十八章和二十章里讲清楚了，除了玷污人使人变得有罪，道德上的不洁从象征意义上玷污了各层圣所，尤其是最外面那层圣所，同时也玷污了上帝的名字,和“圣地“这个名字。
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And,it used to be that twenty or thirty years ago you'd say nothing in France works, and everything works in the U.S, and now it's just the opposite,totally the opposite.
而在二十或三十年前,你会说法国一片混乱,而美国一切运行顺利,现在则恰恰相反,完全相反
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Sure. There was a 20 percent chance that it wouldn't.
当然,它不分裂的概率是百分之二十
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One of the things that's very true about Moscow, right into the twentieth century, is that you had all sorts of peasants living on the edge of Moscow living in these wooden houses.
有一件关于莫斯科的史实,直到二十世纪,在莫斯科的郊外,还有许多农民住在这样的小木屋里
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We wanted this to be a twenty shilling coin but now in the market it's trading at twenty-one.
我们希望它是一个值二十先令的硬币,但现在它在市场上以二十一个先令的价值来交换。
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I'd only have 16 possible two base sequences, that's not enough to specify over 20 amino acids.
如果两个碱基一组那一共只有十六种组合,不够和二十种氨基酸来一一对应
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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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We saw record price declines on a monthly basis for fourteen of our twenty cities that we reported.
我们看到记录中价格每月,在报告中的二十个城市中的十四个城市下跌。
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The British pound was twenty shillings so effectively the pound was on a silver standard.
英国一英镑值二十先令,所以事实上，英镑是以银本位为标准的。
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Then from these beginnings, engineers transformed life in the twentieth century: a lot of things started in the twentieth century and became common place.
从此开始,工程师们改变了二十世纪的生活,有很多东西在二十世纪发明并得到普及
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One of the other things that happened during the twentieth century is that human life expectancy increased dramatically, people started living a lot longer.
在二十世纪发生的另一大变化是,人类的寿命预期显著增长了,人们活的更久了
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There are twenty actually I'm not sure there are twenty anymore.
那上面有二十家交易商,事实上，我不清楚还是否仍有二十家。
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The antebellum Southern economy became by the 1820s, without any question, a slave economy.
从十九世纪二十年代起至内战前,南方的经济毫无疑问就是奴隶经济
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Well what it means is that starting in the 1930s we began to think of central banks as managing the money stock to stabilize the economy.
好吧，它意味着从二十世纪三十年代开始,我们就认为中央银行是,为了稳定经济而,管理金融债券的。
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So they had a guinea which they said was twenty shillings and then there were two coins either shillings or guineas that was the money at the time.
于是，他们就生产出了,一个等同于二十先令的几尼,所以出现了两种硬币,先令或是几尼,这是当时流行的货币。
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And scholarship of the nineteenth century and most of the twentieth century is generally characterized by a deep-seated bias that views impurity rules as primitive and irrational taboos, and sacrifice as controlled savagery that's empty of any spiritual meaning.
十九世纪和二十世纪的大部分时期,学术界都有一个,很深层的偏见，那就是认为不纯的规则是,原始且无理的，献祭是野蛮人才干得出来的,无任何精神意义的活动。
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Stagflation was a term that was developed in the 1970s to refer to a time when inflation is we have both high inflation and high unemployment; and so we're in that situation apparently again.
这种现象有个名字，叫做滞胀,滞胀是一个在二十世纪七十年代,发展出来的术语,指的是通货膨胀中的一段时间;,我们同时有高的通货膨胀和高的失业率；
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The first is this era, of the 1820s, '30s, '40s and '50s, Antebellum America, exemplified most obviously by the anti-slavery movement, which is where we're going to get to as we leave today.
第一个时期,是十九世纪二十年代,三十年代,四十年代和五十年代,内战前的美国,废奴运动就是其典型,这是我们今天下课前要弄明白的
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That creates a problem in the genetic code in that there's 64 possible sequences but there's only 20 some amino acids, so each amino acid can be specified by more than one codon.
这里有个问题,遗传密码有六十四种可能的序列,而只有二十种氨基酸,因此每种氨基酸都有,不止一种密码子与之对应
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