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You don't have to do this for Wednesday but let's say for next Monday, and that is: I'd like you to memorize a short poem by Yeats or by Frost, either one.
你们不用今天做,下星期一吧：,我想让你们背一首短诗,叶芝或者弗罗斯特的都行。
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And it makes things a lot easier, and you know, you don't have to learn building names.
这倒也让事情变得更简单，你不用背建筑物的名字了。
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We were going to have a clicker slide on how many bounced back but it looks like we're having a little technical difficulty with that.
发生背散射，球被弹回来了的,同学请你们站起来,让我算算。
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And, in fact there's a technique of analysis used today that's called Rutherford back scattering where people actually saw that this is a means of identifying the substance, the sample.
事实上这是现在用的一种分析技术,称作卢瑟福背散射,就是人们实际上看到的那样,这是鉴别物质样品的一种方法。
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Then she proceeds to explain that there's lacing over, on the one hand, bowling shoes laced under and lacing under, on the other hand.
于是她接着解释这是足背系带的保龄鞋，那是。
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Milton claims that his love of learning might seem to contradict the parable of the talents.
弥尔顿说这种对学习的热爱,看起来与才能的寓言是相背的。
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It is this Socrates who is brought up on charges of corruption and impiety yet none of this quite answers the question of what is the nature of Socrates' crime.
这是被控腐化,与亵渎神明的苏格拉底,但这都未能完整地回答,苏格拉底所背罪名的本质究竟为何。
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and hit balls as well from the back of elephants, amongst other things.
是从象背上去击球，除此之外都是一样的。
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This is not about how you memorize things, it's about how you think.
这节课教你们怎么背东西的，这是教你如何思考的。
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My back hurts. And we have a lot to wash.
我的背受伤了。我们有很多东西要洗。
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So, it'll be considered a backscatter event if your ping-pong ball hits one of the nuclei.
什么情况是背散射,如果你们的乒乓球。
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We know we need to divide by 266, 266 but what we need you to help us with is to figure out this top number here and see how many particles are going to backscatter. So if the TAs can come up and quickly hand out 1 particle to everyone.
知道背散射的概率就可以了，我们知道要除以,但还需要你们来搞清楚,分子上的数是多少，有多少个发生背散射的粒子,助教们请过来,把这些球分给同学们。
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And I had mentioned several times thatyou do not need to memorize the majority of the equations and you don't need to memorize any physical constants.
另外我已经提过好几次了,绝大多数的公式大家都不需要去背,也不用去记任何物理常数。
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I would recite, whatever, the Articles of Confederation I would rise on my hind legs, quaking in my boots, and I would begin until I made a mistake, whereupon I would be castigated, berated, totally stripped of self-esteem by this monster who would that inflict the same pain on somebody else.
我会背，比如说，联邦条例,我会抬起我的后腿，它在靴子里颤抖，然后开始背，直到犯错，于是，我就会被批评严惩，自尊完全被这个怪物践踏了,他对其他人也会如此加注痛苦。
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Raise your hand if you don't if you don't have a ping-pong ball yet.
这样就可以算,背散射的概率了。
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But in our case, the probability of backscattering is going to be the number of balls that backscatter, and that's going to be divided by the total number of ping-pong balls.
用20除以132000，但现在背散射,的概率是被散射回来的小球，除以总的小球数,你们记得。
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Sam All right. So, we'll move this up to the front in just a minute, but I'm going to explain how this experiment works and we'll do the calculation first before the excitement breaks out.
好的，这是她的女儿,被背带背她在胸前，这是Patti，Christie博士，好的，我们等会,会把它移到前面,但我要先解释下。
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