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I can take you and immediately start designing batteries, because we need ions in motion, we need small ions in motion.
我可以从此让你快速起步设计电池，因为我们需要能运动的离子，我们需要能运动的小型离子。
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I'm 43 years old and I plan to keep doing all the exercises that I love doing, you know, until I die.
我今年43岁，我准备一直做那些我喜欢的运动，你知道，一直到我死。
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The motor neurons are deactivated and then, because the way you breathe is through motor neurons, you then die.
运动神经元被抑制了,也因为你的呼吸是由运动神经元支配的,那接下来你就会死去
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During this part, when you're doing a quarter of a circle, this is supposed to be a quarter of a circle.
在这部分,当你沿着四分之一圆运动,这就是个一个圆的四分之一
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You know, you allow yourself to get in touch with everything that's going on.
你让自己和世间运动的一切,获得一种联系。
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In other words, we said that in intellectual history, first you get this movement of concern about the distance between the perceiver and the perceived, a concern that gives rise to skepticism about whether we can know things as they really are.
换言之，我们曾说过在思想史上，首先你要知道,关注感知者和被感知者之间距离的运动，这种关注会让我们怀疑,自己是否弄清楚了事物的本来面目。
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as Plato and Socrates clearly understand, a very real tendency within democracy to identify the good human being, you might say, the good sport, the regular guy, the cooperative fellow, you know, someone who goes along and gets along with others.
柏拉图和苏格拉底清楚地明白，那存在着一种很真实的倾向,在民主之中辨识出好的人性，你也许会说喜爱运动的人，好人，乐于合作的人，即可以轻易和众人,打成一片的人。
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But you are so busy with your project. You really don't have time to discuss sports.
但是你手头正忙于处理一个项目。你确实没工夫谈运动的话题。
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Most sports and activities like running and cycling are very one-dimensional movement patterns, so you're,
大部分运动和活动，像跑步和骑车，都是很单一类型的运动，所以你,
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Speaking of the Olympics, could you name some of the famous athletes in England?
说到奥运会，你能举例说一些英国著名的运动员吗？
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You reduce a lot of the health risks, if you exercise often.
如果你经常运动的话，它会帮你降低许多健康问题的风险。
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then those are the 2 main horse sports that you'll see.
你会看到这两种主要的赛马运动。
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It's very spiritual, it's very cleansing, and you get exercise.
这是精神层面的运动，有净化作用，你还能得到锻炼。
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Oh really? You should, exercise is fun.
哦，是吗？你应该多锻炼，因为运动是很有趣的。
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What kind of sports do you like?
你喜欢什么样的运动？
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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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so it can do the activity or sports that you like to do.
这样身体就能做你喜欢的活动或者运动。
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But things which were at rest will move at a constant velocity, opposite of the velocity that you have relative to me.
这些静止的东西都在匀速运动,方向正好跟你相对我运动的速度方向相反
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You can take circles of different size and place them against your trajectory and see which one fits.
你可以做不同大小的圆周运动,然后把它们放到你的轨迹上,看哪一个匹配
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So, for example, if you were trying to study the motion of some object, here is one example.
举个例子,如果你想研究某个物体的运动,这里有个例子
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So you should know when you look at a graph like this what it's doing.
因此当你看到这样一个图表时,要知道它是怎样运动的
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When you have a velocity in the moving plane frame and you want to find the velocity on the ground, you should add to every object in the plane the velocity of the plane with respect to the ground.
当你在运动的飞机上运动,然后你想找到相对于地面的速度,你就应该给每个物体加上,飞机相对于地面的速度
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The fact that when you go in a circle, you accelerate is what we're learning here, coming from the fact that velocity is a vector and its change can be due to change in the magnitude or change in direction.
而当你做圆周运动时你也在加速,这是我们在这里所学到的,原因就在于,速度是一个矢量,其变化可以通过改变模长,或者方向来实现
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You see an object in motion, you find a and you give a a certain numerical value, 10 meters per second squared.
你看到一个物体在运动,你会发现它的 a,然后给 a 赋值,10 米每秒平方
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You've got to ask yourself, let the time it takes to do a full circle, that's the time period, do a full circle.
你已经问你自己了,留足够的时间让它运动一整圈,那就是运动整个圆周的时间周期
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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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but you can sort of tell that the particle is moving slowly or rapidly by looking at the space in between these tick marks.
但你可以通过观察计时点之间的距离,来判断该物体运动的快慢
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What that means is, if you know the velocity of the given time and you know the initial velocity, you know what time it is.
这个方程的意义是,如果你知道某个给定时刻的速度,并且知道初速度,你就能知道运动的时间
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So the Earth is an inertial frame of reference, if you go in a train relative to the Earth at constant velocity, you're also inertial.
所以,地球是一个惯性参考系,如果你坐在相对于地球匀速运动的火车里,你也处于惯性状态
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The other two you know are stuff you can add, and you know where you're adding those things, because the particle has a head start.
另外两项是可加可不加的,而且你也知道这两项是怎么来的,因为质点运动是有起点的
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