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Something I can measure and I can tabulate, and when I turn my dT knob here I know what's going to happen to the enthalpy.
----热容，我们可以用实验，测出热容并成表,当我知道这里的变量。
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suppose I asked you to time a 100 meter spring in the Olympics, but I give you a stopwatch that is measured in units of 15 seconds?
如果我要求你,在奥林匹克数给100米短跑计时，但我会给你一个秒表,它可以测出15秒的大小？
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With some degree of confidence, I'm working with a reliable spring and then I will get the mass of the elephant.
这时我就对弹簧有信心了,我用的是一个可靠的弹簧,我能测出大象的质量
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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
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This is very important,which is why I am doing it: "If we want to know how fast a human being can run, then it is no use to average out the speed of a "good sample" of the population; it is far better to collect Olympic gold medal winners and see how well they can do.
这话非常重要，是我作这个研究的原因：,“如果想知道人类最快能跑多快，那从好的样本中测出平均数是“,没用的;,而应该收集田径类奥运冠军的信息,看他们能跑多快。
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In the real world, no one's going to measure it instantaneously, but we can make the difference as small as we like.
在现实生活中,没人能一瞬间测出来,但我们可以使差值越来越小
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That means we can also measure velocity slightly later and make the slightly later come as close to right now as we want.
那我们也可以测出稍微迟一点的速度,让那个速度接近我们前面测得的速度
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Therefore, what we have done now is, we can take all kinds of springs and we can calibrate the force they will exert under various conditions.
因此,我们现在能做到的就是,我们能处理各种各样的弹簧,我们能测出它们在不同的情况下,产生的力的大小
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The word gets around and we want to measure the force.
消息传开了,人们就想要测出这个力
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In that limit, we can measure velocity right now.
取极限的话,我们可以马上测出速度
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How do you find this mass?
你怎么去测出它的质量
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You cannot tell the mass, because what you are doing now is appealing to the notion of mass as something that's related to the pull of the Earth on the object.
你无法测出质量,因为你现在所做的是把质量,用地球对物体的引力给替代了
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