But the speeches of Glaucon and Adeimantus, you might say the circle around Socrates is effectively closed.
但,Glaucon,与,Adeimantus,的发言,你也可以说,那环绕着苏格拉底的圈子实际上是封闭的。
open your textbook and put a circle around question number one.
打开你的课本,在第一个问题上画一个圈。
I have shown you yesterday that the speed of the particle as it goes around the circle is this .
我昨天讲过,质点做圆周运动的速率等于这个
These are some minor characters who lived with them and went to Columbia with them, or were in their circle when these writers lived in the neighborhoods ] in New York around Columbia University.] So, Allen Ginsberg is Carlo Marx, and Ginsberg went to Columbia.
这些是和他们住在一起的次要人物,和他们一起去了哥伦比亚的,或者当作者住在,纽约哥大附近的那个小区时,是他们圈子里的人],因此,艾伦金斯堡就是卡洛马克思,金斯堡去了哥大。
When a body is going around a circle, they say that's some centrifugal force acting.
如果一个物体做圆周运动,他们就说有离心力作用于这个物体
It's related to the frequency with which you go around the circle Why is that?
它也跟圆周运动的频率有关,为什么呢
This describes a particle that's going around in a circle.
这个式子描述了质点的圆周运动
It's going around a circle.
它沿着圆周运动
That means, it can only be rattling around in a circle of radius R.
也就是说它只能,限制在一个半径为 R 的圆上运动
We know it's going around in a circle because if I find the length of this vector, which is the x-square part, plus the y-square part, I just get r square at all times, because sine square plus cosine square is one.
我们之所以知道它做圆周运动,是因为我求出了这个矢量的模长,也就是 x 的平方加上 y 的平方,我就得到了它在任意时刻的模长平方,因为正弦平方加余弦平方始终等于1
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