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1·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。

2·I am the spin angular momentum.

我就是旋转的角动量。

3·It has spin angular momentum.

有了旋转的角动量。

4·That's a spin angular momentum.

那是旋转的角动量。

5·Look at that spin angular momentum.

观察那个旋转角动量。

6·Why? Because it has angular momentum.

为什么，因为有了一个角动量。

7·Angular momentum is in this direction.

角动量是这个方向了。

8·What will the spin angular momentum do?

旋转的角动量会怎样呢？

9·What will the angular momentum vector do?

角动量的矢量会怎样呢？

10·Angular momentum is now in this direction.

角动量现在是在这个方向。