He had an angular face with prominent cheekbones.
他有一张颧骨突出、棱角分明的脸。
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。
That's a spin angular momentum.
那是旋转的角动量。
That is the angular frequency.
这是角频率。
Why? Because it has angular momentum.
为什么，因为有了一个角动量。
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？
这等于角加速度。
What will the angular momentum vector do?
角动量的矢量会怎样呢？
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。
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。
Spinning this direction, angular momentum is in this direction.
这个方向旋转，角动量是，这个方向。
And angular acceleration is the derivative of angular velocity.
角加速度等于，角速度的导数。
So the torque is persuading the spin angular momentum to change.
所以力是使得旋转的角动量,改变的理由。
So spin angular momentum has the property of stabilizing things.
旋转的角动量有，稳定事物的性质。
Her black hair framed her angular face and reached her shoulders.
她一头黑发齐肩，突显出有棱有角的脸庞。
The units are in radians per second, the same as angular velocity.
单位都是，弧度每秒，和角速度一样。
Somehow, it has the smell of some conservation of angular momentum.
不知怎么的，这一定律和,角动量守恒定律有所相似。
That means if there's torque, there's a change of angular momentum.
这意味着，如果那有一个力矩，就会有角动量的改变。
Bohr says that the energy is quantized through its angular momentum.
波尔说能量通过角动量，被量子化。
The researchers are not sure what drives this angular disparity.
研究人员并不确定是什么因素导致了坡度的出入。
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