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We know now with the same spring, by this comparison, we will find all objects now can be attributed a mass.
我们现在知道利用相同的弹簧,采用这种比较的方法,就会发现,所有物体都有确定的质量
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Listen, I have seen this person's work in these eight context and it's all been great. You know.
他说，我曾经见过这个人在八种环境下工作，而且工作质量都很高。
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So, massless bodies will always have, like a massless rope, equal and opposite forces on the two ends.
所以无质量的物体,比如这个绳子,两边所受的力永远都相等
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If you add all these up then you end up 011 with 12.011 as the atomic mass.
如果你将这些都加起来，你会得出,原子质量是12。
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This led people to go back and look at the places that were manufacturing the vaccine to make sure that they were all producing vaccine of the proper quality.
这现象让人们回溯并且审视,制作疫苗的地方,以确认他们生产的疫苗,质量都合格
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He brings with it important benefits and in the passage that I'm referring to, he defines himself as a gadfly, everyone will remember that, the gadfly who improves the quality of life in the city.
他强调能带来显著好处,在我将引用的段落中，他自称是只牛虻，众人都将铭记，是牛虻改善了,城邦的生活质量。
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So, let's go ahead and define our variables here, they should be familiar to us. We have the mass, first of all, me m is equal to m e, so that's the electron mass.
让我们继续定义这些常数,我们对这些应该都很熟悉了，首先，我们有质量，m等于。
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and make sure that all students have access to really good schools
确保每个学生都能获得高质量的教育，
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In all these examples, this rope is assumed to be massless.
在所有这样的题目里都假设绳子没有质量
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In fact, there's a property of gravitational fields anywhere, even in outer space, but there is some residual field between all the planets and all the stars in the universe, that the force on a body is proportional to the mass of the body.
实际上,这是任何地方的引力场都具备的属性,甚至是在外太空,在所有的行星和恒星之间,存在着某种剩余场,在这个场里作用在物体上的力,和物体的质量之间存在比例关系
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We know there is no thing called a massless rope, but most ropes have a mass, but maybe negligible compared to the two blocks you are pulling, so we'll take the idealized limit where the mass of the rope is 0.
我们都知道无质量的绳子是不存在的,是绳子就有质量,但是相比于这两个物体就可以忽略不计了,所以我们有了这个理想的条件,即绳子的质量都是 0
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It turns out, it's part of a big picture and all of general relativity is based on this one great equivalence of two quantities which are very different attributes.
已经证明的是,这确实只是冰山一角,广义相对论的所有理论,都是建立在这两个质量相等的基础之上,而这两个质量的属性有很大差异
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And we all to some degree embody this quality in ourselves.
我们多少也都,体现了这种质量。
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First one says, if you knew the force acting on any body, without going into what caused the force, then you may set that force equal the mass times acceleration of the body.
第一部分是,如果你知道作用在任一物体上的力,无论这个力的来源是什么,都可以令力等于质量乘以物体的加速度
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That's how by either balancing the unknown force with a known force or by simply measuring the acceleration as I fall towards this podium and multiplying by mass, you can find the force that exerts on me.
我们既可以让未知力与已知力平衡,也可以只测量我冲向讲台时加速度的大小,再与我的质量相乘,都能求出作用在我身上的力的大小
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