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So it doesn't matter how big the dictionary is, you can instantaneously retrieve the value associated with the key. Extremely powerful.
因为你可以在线性时间，内得到想要的键对应的值,这太强大了。
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For example, let's pretend that you are speaking with a friend who had been studying for a test for some time.
例如，我们假设你跟一位朋友在聊天，他已经为一门考试复习了好一段时间。
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You didn't know who wrote it, where, when, how, why, and someone says to you, "I want you to draw some conclusions about that piece of writing.
你不知道是谁，在哪里，什么时间，怎么样，为什么要写,然后你被要求对篇文章，做一个总结。
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The crucial point about the syllabus is that it indicates what reading you need to have done for any given week.
教学大纲的关键点,是指出了什么样的读物,你需要在给出的时间内完成。
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Now do that in a sound byte on a national radio station when you got two minutes to answer.
这时你就得为全国听众一字一句地,在两分钟时间内解答这个问题
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We normally think of teaching as a synchronic process, you and I are in the same place and in the same time while we are learning, when in fact at least right now we are not.
我们通常设想教学是限于一时的过程，你我在同一地点,同一时间学习，但事实上至少现在就不是这样。
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OK, in a few minutes we're going to start talking then about what is computation, how are we going to start building those tools, but that's what you should take away, that's what you're going to gain out of this course by the time you're done.
好啦，我们会花一点儿时间,谈谈什么是计算，我们如何去建造这些工具，但是这些是你应该，在离开这个课堂时,应该学会的事儿。
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Now, if you dug a hole here until there, and of course it may work until that happens.
现在,如果你在地上挖个洞,让这个物体下落时间足够长,那还说得通
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He said to gain time: "What is it you see?"
他为了赢得时间，说：,“你在看什么？“
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And so you care-- you care about ultimately how much time is my algorithm gonna take to perform on that worst case running time.
因此你最终所关心的是,算法在最坏情况下需要多长的,运行时间。
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I don't know what the dates say, 1916, excuse me, and you can see what he's done.
我不知道具体时间了，1916年，不好意思，你能看到他在做什么了。
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But when you have many page views and that many people spending much time on the site, you can monetize it pretty easily just by putting matters on there.
当拥有那么大的访问量,当人们花大把时间在你的网站上时，仅靠投放广告,就能轻松赚钱。
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When you buy a house, you borrow the money and you pay it back in fixed-- it would usually be monthly, but let's say annual payments.
当你买了一座房子,你贷了些款,然后你在一定的时间内偿还一部分,一般来说都是按月来算的,但是假设我们是按年支付的
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The older you are, the more--the higher you tend to score, maybe obviously, not--the longer you've been in the country the higher you tend to score.
通常年纪越大，圈的人就会越多，这是很明显的，你在这个国家时间越长，圈的人就越多。
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So, how many distinct, so again, we're talking about distinct kinetic energies, a spectrum for the element hafnium, 72 and I'll tell you here that it has a z of 72, so you don't have to spend two minutes searching your periodic table.
好，有多少分立的……还是一样，我们讨论的还是不同的动能，铪元素的光谱中出现，而且我来告诉大家铪的原子序数是，这样你就不用因为在元素周期表中找它,而花费两分钟的时间了。
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The trouble is, you just don't know when that explosion took place, and since there are several periods in this general area that we're talking about now, in which something big happened, some great change takes place, it turns out different people want to have their explosion at different times.
问题是,你不了解火山爆发的,确切时间以及这种爆发,在这个区域又延续了很多个时期,这些时期发生了许多重大事件和重大变化,结果就是不同人对,火山爆发的时间推测各不相同
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you could maybe be speaking with a friend who talks about his long work hours and you are very surprised,
在你跟一个朋友聊天时，他谈起自己很长的工作时间，而你感到非常惊讶，
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How many Islamic chaplains would you say there are in America, how long has this program been happening, and how many classmates do you have?
你认为在美国,有多少伊斯兰教的教士？,这个项目有多长时间了？,你又有多少同学呢？
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If you were in the wrong place at the wrong time, you were history. That was all.
如果你在错误的时间出现在错误的地点,那你就将死定了
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In our business, you got to be inventing new things because software doesn't wear out, it doesn't break, or at least if it breaks it was broken when you finished it, it doesn't break over time the way physical goods do.
在我们行业，你需要不断发明新事物,因为软件并不会磨损，不会坏，或者至少如果坏了,也是在你运行完之后，它并不像物理上的东西会随着时间磨损。
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Will you be able to do a lot of good in a for-profit organization,not for profit organization, on the board of your previous school, with your money,with your time?
你们能够做善事吗,在一个非营利机构里行善，在你母校的董事会，贡献金钱和时间？
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And so for any given week you can find the reading.
所以在给定的时间里你可以找到那些书。
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If you don't make it to class, contact your TA, your recitation instructor, and you can take a makeup within a week of the time of original test.
如果你不能来上课，联系你们的助教，背诵课的老师，你可以在测试后那个礼拜内,找时间补回来。
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The hours are long, the pay is mediocre, nobody respects your contribution, yet you freely choose to work here.
工作时间长，薪水不高，没有人尊重你的贡献，但你还选择在这里工作。
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How would you recommend that investors protect their wealth during this period to ? take advantage of upcoming investment opportunities?
那你对投资者在这段时间内,如何保护他们的财产并且,进一步利用这即将到来的投资机会有什么建议呢？
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Where and when do you want to peak, ? as it were, in terms of your accomplishments?
你想在什么时间到达巅峰，如果它说的是你的成就方面？
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You spend a lot of time talking about the transition between alchemy and modern chemistry.
在高中化学你很多时间是花在,了解从炼金术到化学的改变上。
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Well, you got to realize that much of the time, until the phalanx breaks, there's not a lot of killing that can go on.
你要知道,在方阵被打乱前的大部分时间里,不会有太多的伤亡
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You see how long you are in the air and the whole time you are in the air, you are traveling horizontally at this speed.
你可以知道在空中停留的时间,当你在空中运动的时候,你一直以这个水平速度在运动
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It's definitely an opportunity for help, but particularly, as an opportunity to work with someone for just a few moments to help get you unstuck or to get you past some stumbling block that, otherwise, if you struggled with on your own, you might sink or waste even multiple hours on just something that you're not seeing.
这是一个寻求帮助的机会，特别是，作为一个与某人一起工作的机会,他们能帮助你解决问题,或帮助你越过绊脚石，否则，如果你自己单独奋斗，你可能,浪费很多时间在,你不了解的东西上。
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