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Welcome back for those returning, welcome to CS50 for those joining us for the first time.
欢迎老同学，也欢迎新同学。
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So, I really want to go back for my Bachelor's,
所以，为了拿到学士学位，我真的很想回去，
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Let me pull back for a second then.
我过会儿再讲解这里。
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In other words there was not enough data on these things, in other words, with other conventional mortgages, you have data covering peace and war, prosperity and depression and so forth and you can follow these data back for decades.
换句话说,关于这些新增贷款没有足够数据，换种说法，和其他传统贷款相比，你有和平和战争时期的数据，有市场繁荣和萧条时的数据等等,你可以追述这些数据。
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It's also about: how banks operate; what their function is in our society; and, why they are such important institutions that have gone back for hundreds of years and remain powerful, central features in our economy.
也会讲到,银行如何运作,银行在社会上的功能,以及为什么几百年来,银行依然在经济生活中拥有,重要的作用
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Well let's take a step back for a minute; that's one way of looking at Biomedical Engineering, by looking at sort of the things that you know about that have been the result of the work of biomedical engineers and talk more generally.
好的,话说回来,了解生物医学工程的一种方法就是,通过看一些你们熟悉的东西,它们同时也是,生物医学工程的研究成果,并对它们做一般意义上的讲解
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and I'm coming back for her on Friday.
然后，我周五再过来接她。
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And they said to one another, "Let us head back for Egypt."
他们一个对另一个说着“,“让我们回埃及去“
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And then, they hand me that receipt and I sign for that receipt and then I give it back to them.
之后他们给我收据，然后我在上面签字,然后把收据交还他们。
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Well, a while back I said that we'll use it at least for a few weeks this moniker string.
好的，前阵子我说过，我们将至少,要使用这个绰号几周。
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Let's flip back a step beyond that to Mycenaean civilization for the purpose of noting the great contrast, the great change.
让我们跳回到迈锡尼时代,比较看看两者间巨大的差异,也就可以明白希腊的巨大进步了
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But when he take a wooden block tower apart and then put the pieces back together piece for piece duplicate.
但当你拆掉堆好的木积木,又把它们重新摆在一起,照原样一块块摆好。
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So the challenge thing comes back to the instruction of designer: what are you for on this access?
这样，教育设计者,又重新面临着挑战：,你会支持这项技术吗？
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These are all isoelectronic, they all have the same electron configuration. And we can also think about going back to atomic size for a second.
这些都是等电子的，它们都有相同的电子排布，而,我们还可以再回想一下原子尺寸的概念。
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It makes us think about black artists playing for a living in Prohibition Era back rooms.
它使我们想到在禁酒令时代的小密屋里,那些演奏谋生的黑人艺术家。
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If it's too heavily advertised, well that screams out for government regulation to cut back on marketing.
如果是因为铺天盖地的广告宣传,那就要呼吁政府出台法规以控制过度宣传
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