So you know, what the second law is doing, in other words, it's putting these restrictions on how well or how effectively we can convert heat into work in the case of the engine, or work into heat extracted in the case of a refrigerator.
你们知道,在热机中,热力学第二定律的作用,换句话说,就是给热量,转化为功的效率,施加限制,或在制冷剂中,对抽取热量,进行限制。
If you have your health, luck comes and goes and realize when you're doing really well that it's not just you. Then, when you're not, it's not just you either.
如果你很健康而且运气来来去去,当你做的很出色的时候你意识到不只是你很出色,当你不是很出色的时候,也不仅仅是你自己做的不好。
Last time, I invited you to think about life on the experience machine, where the scientists are busy stimulating your brain in such a way as to give you an exact replica, from the insides of what it would be like having identical experiences to the ones you would have if you were really doing-- well, whatever it is that's worth doing.
上节课,我要你们思考,体验机里的生活,科学家们用它刺激你的大脑,给你一份完美的体验复制品,从体验相同的经历,到体验在现实生活中-,值得做的事情。
General Motors, as you know, is an auto producer in the United States and it hasn't been doing well, as you may have heard -as is the general auto industry in this country; it's suffering under competition from abroad.
通用汽车公司,众所周知,是美国的汽车制造商,它现在效益不好,也许你们听说过,整个国内汽车行业的情况都不好,它承受着来自海外品牌的竞争
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