He had an angular face with prominent cheekbones.
他有一张颧骨突出、棱角分明的脸。
Why should I join the straying mass who want to make everything angular?
为什么我要加入那些想要把一切都变得棱角分明的走失群体?
For example, no matter how much a dancer wishes to leap off the floor and then start turning, the law of conservation of angular momentum absolutely prevents such a movement.
例如，无论一个舞者多么想要跳离地板，然后开始旋转，角动量守恒定律绝对阻止这样的动作。
On a neck amphora, the handles are attached to the neck, which is separated from the belly by an angular carination.
在颈瓶上，手柄固定在颈上，并通过有角度的旋转与腹部分开。
有了旋转的角动量。
That's a spin angular momentum.
那是旋转的角动量。
That is the angular frequency.
这是角频率。
Look at that spin angular momentum.
观察那个旋转角动量。
角动量。
Why? Because it has angular momentum.
为什么，因为有了一个角动量。
Angular momentum is in this direction.
角动量是这个方向了。
Don't confuse it with angular velocity.
不要把它，和角速度混淆。
What will the spin angular momentum do?
旋转的角动量会怎样呢？
So it has a phenomenal angular velocity.
它有个明显的角速度。
What will the angular momentum vector do?
角动量的矢量会怎样呢？
Angular momentum is now in this direction.
角动量现在是在这个方向。
And what does the spin angular momentum do?
旋转的角动量怎么了呢？
What is the magnitude of that angular momentum?
角动量的，数值是多少？
It describes the angular momentum of the electron.
它描述的是，电子的叫角动量。
We have here the spin angular momentum that you saw.
这有一个旋转的角动量,如你们所见。
Actually, we are rotating at unit angular speed.
实际上，是以单位角度旋转。
You give it spin angular momentum, it becomes stable.
有了一个旋转的角动量，就变得稳定。
Spin angular momentum will start to chase the torque.
旋转的角动量会开始，跟随那个力。
The actual speed is the radius times angular velocity.
实际的速度就是半径乘以角速度。
I've changed the direction of the spin angular momentum.
我改变了旋转角动量，的方向。
We call it angular frequency, and the units are the same.
我们叫它角频率，单位是一样的。
So this is a linear velocity, this is an angular velocity.
因此这是线速度，那个是角速度。
Angular momentum is pointing straight at me, away from you.
角动量直接指向我，远离你们的方向。
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