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It gives you a lot of expressive convenience, you can write the programs much more cleanly, but most importantly, it's fast.
你可以把一些程序写的更清楚，最重要的是，它的效率非常高。
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In the meantime, I believe that the U.S. is doing quite a bit of work in terms of raising fuel efficiency standards,
同时，我相信美国在提高燃料效率标准方面做了不少事，
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And in practical terms, we can define the efficiency as the ratio of the heat in to the work out.
在实际中，我们定义,效率为热与功的比值。
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Some programs won't stop until you're old and gray. And these are really different efficiencies, and we want to give you a sense of how do you reason about those different kinds of programs.
头发花白之前是不会停的,这些是因为它们的效率不同,我们想要给你们理解,这些程序之所以,表现不同的原因。
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I mean, lately they've been more inefficient, in my view, because the Fed's creating too much money.
我是说，最近市场表现的更没效率，在我看来，这是因为美联储发行了太多的货币。
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I mean, isn't it somewhat inefficient to load it really deep, because I assume if a spear is only six feet long, what are people in the back going to be doing?
我觉得,过于厚实的方阵会影响效率,据我所知,长矛也就六尺来长,那站在方阵后方的战士都在干什么呢
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If you want a more technical term for that , and you'll remember this from economics 115 can lead to outcomes that are "Inefficient," that are "Pareto inefficient," But "Suck" Will do for today.
要是想说的更专业店,记不记得在经济学115里面说的,会导致“不充分的”结果,即"帕雷托效率",但我们今天说"糟糕"就可以了
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He's going to ameliorate their conditions, he's going to make their slavery on his plantations so effective, so good, such a even joyous form of labor, that he will be doing God's work by improving slavery.
他会改善奴隶们的生活条件,他会让自己种植园的奴隶们,提高工作效率,优化管理模式,奴隶甚至是一种令人享受的工作,他会按照上帝的旨意提升奴隶的生活水平
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What's now the most efficient use of people's time, like how can people maybe be working on stuff not serially but I didn't say someone's working on launching a high school product on the photos and someone else is working on the thing every launch next to each, you know.
才能达到最高的工作效率，也许可以摒弃,连续工作的模式,我并不是说,他们是在开发一个小儿科的产品,有人负责建立相册,有人负责,下周要开启的项目。
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where they are no longer efficiently working for their company.
他们工作的效率就不再那么高了。
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Now, we concluded last week at looking at sorts and efficiency, some new notation called asymptotic notation and we'll continue that story today.
上周我们着眼于排序和效率问题，并提出一些渐近线的新符号,今天我们将继续讨论相关内容。
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And in this way you can increase the utility and ease of training.
应用代币法，你可以提高效率,降低训练难度。
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If the vehicle in the unfortunate circumstances of a collision, has to be able to maintain the security of the hydrogen which means more mass, which means a lot of the efficiency is being squandered What's the environmental impact of hydrogen production?
如果车辆,在碰撞中发生了不幸，要仍然能够保持氢气的安全性的话,意味着需要更多的质量，也就是说大部分效率被浪费了,制氢对环境有什么影响呢？
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People do that with differing levels of efficiency.
人们存储能量的效率各不相同
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In principle, this value, this efficiency, can approach 1 as the low temperature approaches absolute zero.
这个值，效率，当低温热源的温度1,是据对零度时可以达到一。
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All right, so you can't get perfect efficiency, 0 but at least if you were able to go to zero degrees Kelvin, then you'd be all set.
好吧，你得不到完美的效率，但至少如果能把温度降到,那你就万事俱备了。
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And so instead of defining efficiency the way you've got it written there, I'm going to define what's called something different for a refrigerator which is called the coefficient of performance.
现在我们不用,效率的那个定义，我给出一个,有关制冷机的,新的定义,叫做制冷系数。
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Now. It's a quick sidebar, I've got to say, I'm sure talking about efficiency to folks like you probably seems really strange.
这是个快速寻找的工具，我必须说跟你们讨论效率,看起来有点奇怪。
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Whether they're more inefficient when things are going up or when things are going down.
是不是在事情进展顺利或受阻的时候,市场会更没有效率。
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I think they're working too little here compared to what's efficient.
我认为他们没有达到最优效率
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He said Southerners are "Proud, brave, honorable by its" The South is "Proud, brave, honorable by its lights, courteous, personally generous, loyal, swift to act, often too swift, but signally effective, sometimes terrible in its actions.
他写道南方,"因自豪勇敢而可敬",南方人,"因自豪勇敢而可敬,他们彬彬有礼,对人慷慨,他们忠诚,行动迅速,常常过于迅速,但他们效率显著,有时甚至不择手段
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So that means we can rewrite this efficiency.
这意味着我们可以重写出效率。
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Is this possible? That's what the first law says it's possible; work is heat, and heat is work, and they're the same thing. You can break even 100% maybe. So let's go back and see what work is.
00%的效率,我们可以从大气中吸收热量，用来驱动我们的汽车,效率也应该能达到。
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So what this says is the efficiency of any reversible engine T1 has to be one minus T2 over T1.
这就是说,任何可逆热机的效率都是,负T2除以。
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Now that already tells us what we know, which is that the efficiency is going to be something less than zero, right?
我们都知道这个，这结果就是说效率,是负的，对吗？
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But what we-- what we do want to do, is to give you some intuition about how to approach questions of efficiency.
但是我们想要你们产生，对于处理效率问题的一些直觉,你应该会意识到为什么。
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I want to talk about efficiency, and we're going to, or at least I'm going to, at times also refer to this as orders of growth, for reasons that you'll see over the next few minutes.
为什么是很有价值的，我想要讨论下效率，我们将会，或者至少我将会不时的，提到有序的增长,原因你们很快就会明白的。
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So that efficiency is something less than one, and we'd like to figure out what that is.
因此效率肯定小于一，接下来解释这是为什么。
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And we want to help you learn how to map a problem into a class of algorithms of some efficiency That's our goal.
学会如何将一个问题,映射到一类,提升效率的算法中去,这就是我们的目标。
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If you could get to zero degrees Kelvin, you'd get perfect efficiency, 0 but you can't get to zero degrees Kelvin, you can't. Even if you have an infinite amount of resources, you can't get there.
如果能达到，你就能获得完美的效率，但你得不到，得不到，即使你有无穷多的资源,你也做不到。
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