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。
Revisions implying that you've got something and then it's worked over again, additions might be made so now that's a new source.
修订意味着,你已经有素材,重新研究,这时候所增加的,变成了新的素材。
And if it returns a value, you've got to do something with that return value too, much like we did up here.
如果它返回了一个值,你便用那个返回值,做一些事情,就像我们刚在上面做的。
Let's suppose that in order to believe in something, you've got to be able to picture it.
让我们先假设要相信一件事,这件事必须是可以被想象的。
You buy something that's down 30% but it's got another 50% to go and I think it just has to do with time horizon.
某资产价格下跌了30%,你买入,而后它反弹又上涨50%,我认为上涨只是时间问题
So again, if you do a calculation where you're close enough to the ideal gas and you need to design your, if you have an engineer designing something that's got a bunch of gases around, this is a useful thing to use.
要研究近似理想气体的表现时,这个方程非常有用,下面再来看一个,对我们来说最有意思的,实际气体状态方程:,范德瓦尔斯方程。
All right. I tried it on 2, I surely didn't expect a precise and exact answer to that but I got something, and if you square this, you'll find the answer kept pretty darn close to 2.
好,我试试求2的平方根,我当然不希望得到一个完全准确的答案了,但是我得到了一个近似值,试试将这个数平方一下,你会发现结果和2相当接近。
You measure your temperature is a little up, you've got a fever, something's wrong, I better find out what that is' because temperature is a very highly controlled variable.
你测出体温偏高是,你就发烧了,身体哪里出问题了,我最好把问题找出来,因为体温是一个严格控制的身体指标
Or if you want to tolerate negative numbers, you've got to sacrifice something.
如果你想也用来表示负数呢?,你不得不拿出一部分来表示。
Isn't there a kind of logical requirement that for something to be bad for you ? you've got to be around to receive that bad thing?
难道没有这样一种逻辑要求吗,如果有什么事物对你来说有坏处,你不是应该去接受那个有害的事物吗?
I think probably we shouldn't believe the theory of belief which says that in order to believe in something, you've got to be able to picture it or believe it.
我觉得我们不能相信下面这种理论,如果要相信一件事情,这件事情必须能够被想象出来。
if at any point you've got something you want to ask about or some two bits you want to add, raise your hand, wiggle it around, make sure I see you.
任何时刻如果你有想问的东西,或者你想要加上什么东西,请举手,摇晃起来,确保我能看见。
Then you've got something that will pay you something forever.
这份公债能确保你永久收到利息
Because,indeed,they don't exist They're merely possible And we might say,you've got to exist in order for something to be bad for you But once we say that it seems we're running towards the position that in that case,death can't be bad for me because of course,when I'm dead,I don't exist ? So how can anything be bad for me?
因为他们其实并不存在,他们只是一种可能,我们由此认为你必须首先存在,某事才会让你害怕,但我们一旦这么说,我们似乎会得出这个结论,这种情况下死亡不可能让我害怕,因为我死了就不存在了,所以我怎么会害怕?
Whatever you think those are. Here, you might imagine different people disagreeing about-- oh, but throw in something--but if what you want to do is write the great American novel, then you've got the experience of staying up late at night not knowing how to make the plot work out, crushing pieces of paper and throwing them away.
你能想到的都在里面,可能有人不同意-,插入某某东西,比如你想,创作最伟大的美国小说,于是你获得熬夜的体验,纠结于如何构建情节,撕碎稿纸,扔在一边。
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