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All that is solid melts into air," Karl Marx said, evoking the accelerating transformation of modern economic and social life.
正如卡尔马克思所说，“一切坚不可摧的都烟消云散了“,唤起了现代经济和社会生活,产生变革的加速。
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Now, gravity, well force, is equal to mass times acceleration, g and the acceleration due to gravity is g.
是重力，等于质量乘以加速度，由重力导致的加速度是。
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They take an atom of lead, accelerate it and have it collide with an atom of nickel.
他们选取一个铅原子，将其加速,让它与镍的原子碰撞。
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Everything -- gold, silver, diamonds, particles -- everything accelerates the same way in a gravitational field, due to this remarkable fact.
所有东西,金,银,钻石,粒子,所有东西,在引力场作用下都以相同的方式加速,原因就是这个显著的事实
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That's amazing, you can get atoms to smash atoms and create a chain reaction and create power-- that's a pretty amazing invention.
很惊人，你可以利用原子去做加速粒子,并产生连锁反应，然后创造能量-,那是个十分惊人的发明。
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It's possible that Milton's actually suggesting, I think, that this poem helped bring that ruin about.
很有可能弥尔顿是在暗示，这首诗促进了教会的加速崩溃。
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Her heart is beating a little faster, her palms are beginning to sweat, her breath is coming a little shorter than it otherwise would.
她的心跳开始加速，掌心开始冒汗，呼吸变得短促。
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Now, I'm going to be rather quicker in discussing this family of arguments, but let me take at least a couple of minutes and do something about that.
现在,我会加速,讨论这类论证,但起码让我花几分钟,来稍微提一下
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Why should the amount by which you're attracted to the Earth be also a measure of how much you hate acceleration?
为什么物体受地球引力的大小,恰好能衡量物体加速的难易程度呢
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So, a massless body cannot have a net force on it, because the acceleration of the rope cannot be infinite.
所以没有质量的物体不会受到力,因为绳子的加速度不可能是无穷大
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Take the difference of the two velocities and divide by the difference of the two times, and you've got the acceleration.
求出速度的差值,除以时间的差值,这样就能得到加速度
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In fact, it has to be some finite number, which is the acceleration of either of these two guys.
事实上它必须是有限的数值,也就是这两个物体某中某一个的加速度
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The answer is that simply knowing the particle has an acceleration is not enough to tell you where the particle will be.
答案是这样的,仅仅知道质点的加速度,是不足以告诉你它接下来的运动的
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The advantage of introducing that guy is that if you like, I can now write an equation for the acceleration as a vector.
引入它的好处是,如果你愿意的话,我可以把加速度写成矢量形式
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In other words, you don't have to be moving actually in a circle to have the acceleration.
也就是说,你不必真的在一个圆上运动以获得相应的加速度
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If I pull the one kilogram mass and I let it go, it does something, some acceleration.
如果我拉 1 千克重的物体并松手,就会获得一个加速度
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Mass of an object is how much it hates to accelerate in response to a force.
物体的质量,反映了物体在力的作用下加速的难易程度
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This particle is constantly changing its direction, but it therefore has an acceleration and the acceleration, we have shown here, is pointing towards the center.
这个质点恒定地改变它的运动方向,因此它具有加速度,而且这个加速度,我们前面也讲过了,指向圆心
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While they're sitting there thinking about painful shock it's making their heart beat faster, it's making their palms sweat, it's making them breathe harder maybe.
因为在等待痛击实验时,他们的心跳加速，手心冒汗，可能呼吸开始急促。
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It means, when you are accelerating upwards, as the elevator picks up speed, the reading on the spring will be more and you will feel heavy.
也就是说当你向上做加速运动时,就像电梯加速的时候,弹簧的读数会增大,你会觉得自己变重了
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If every time I get the same acceleration, I'm convinced this is a reliable spring that is somehow producing the same force under the same condition.
如果每次都能得到相同的加速度,这个弹簧的可靠性就能令人信服,即它在相同的条件下能够产生相等的力
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Their difference divided by the difference in times is going to be the acceleration.
它们的差值再除以时间的差值,就是加速度
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That is 6 Newtons divided by 3 kg is also an acceleration of 2.
即,6 牛除以 3 千克同样得到加速度是 2
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So, that's a funny property of conventional mortgages -that the mortgage balance declines very slowly at first and then it falls rapidly when it comes to maturity.
这是普通贷款很有意思的特性,即贷款余额在起初减少的非常缓慢,但随着到期日的临近,便会加速递减
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But if you imagine making these measurements more and more and more quickly, in the end, you can measure what you can say is the acceleration now.
但如果你想越来越短的时间内,测量这些数据,最终,你会测量出你所说的现在的加速度
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The fact that when you step on your gas you accelerate, everybody knows.
所有人都知道踩油门就能加速
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But I can add to this some number, like 96, that'll still have the property that if you take two derivatives, you're going to get the same acceleration.
但是我可以在后面加上某个数,比如96,经过两次求导你仍会得到,同样的加速度
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And the experimenter is back there with the speed knob and at random intervals he just speeds up the tape of their heart and then slows it down.
实验者回到实验室，带着录音设备,随机地,他加速了心跳的录音,然后又慢下来。
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And later on if you right before or right during you give the dog some food you--you ping a bell the bell will cause the saliva to come forth.
,在喂食前或者喂食过程中,你摇铃,铃声就会加速唾液的分泌。
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But there are effects of the Earth's acceleration, which we'll demonstrate.
但地球的加速度还是会产生影响,这一点我们马上就要证明
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