Others never were at Yale, and yet at the same time it's a movement closely associated with this institution.
也有一些人不曾来耶鲁,但同时还是发起很多运动,和这所大学有着密切的联系。
Well, I'm really into sports as you can probably tell.
好啊,我很热爱运动,你可能看得出来这点。
So if you were learning rhetoric, for example, you might practice giving speeches at the gymnasium.
如果你在学习修辞学,就可以在运动场通过演讲来练习。
The great discovery that Galileo and Newton made is that you don't need a force for a body to move at constant velocity.
伽利略和牛顿的伟大发现就是,物体不需要力来维持匀速运动
The child starts off grasping the world only in a physical way, in a sensorimotor way, but when he gets to the preoperational period, the capacity to represent the world, to have the world inside your head, comes into being.
开始的时候,儿童只能通过生理的方式,通过感知运动的方式,来认识世界,但是当儿童进入了前运算阶段,他们便逐渐拥有了表征事物,在头脑中构建世界的能力
And the electrical energy is the product of the charge on the electron times the voltage which is the potential difference through which the electron was accelerated. And so this allows me to, by increasing the voltage, increase the energy on the electron.
电子能量是电子上的电荷数,乘以电压的结果,这是种内在的差距,通过它电子运动得以加速,这也让我,通过增强电压,来增加电子能量。
always comes back to sports. Not just a product.
归结到运动上面来。它不仅仅是一个产品。
No, I don't have enough time to exercise.
我一向来都不运动,因为我没有足够的时间。
If you want to describe this particle, what's the kinematics?
如果你想描述这个质点,如何从运动学角度来描述呢
They're trying to achieve satisfaction through their mouth of a sort they didn't get in this very early stage of development.
他们想通过这种口腔运动,来获得本该在口腔期获得的满足感。
Any genocidal movement that has left behind a written record has been shown to use the mechanism of disgust to dehumanize people and make them easier to kill.
任何有记录的种族灭绝运动,都利用过反感这个手段,来抹杀人性,使得更容易杀害他们。
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
So, I'm going to illustrate the idea of kinematics by taking the simplest possible example.
所以我会用很简单的例子,来解释运动学
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
So what I've said so far is, a particle moving in time from point to point can be represented by a graph, x versus t.
到目前为止,我说过,一个质点随时间的连续运动,可以用一幅x-t图来表示
For example, suppose you use vertical motion and you use y instead of x; and a would be g or -g; that's a particle falling down under the affect of gravity.
例如,假设在竖直运动中,你用 y 来代替 x,那么 a 就是 g 或者 -g,这就是一个受重力作用下落的质点
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