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。
I am the spin angular momentum.
我就是旋转的角动量。
有了旋转的角动量。
Look at that spin angular momentum.
观察那个旋转角动量。
So this was originally the spin angular momentum of the wheel.
所以，这是原本的旋转的，角动量。
And so the angular momentum of spin of the wheel is in this direction.
所以旋转的角动量是，这个方向。
But notice that l, the spin angular momentum, has moved from here to here.
注意l，旋转的角动量，已经从这移到了这。
But notice that l, the spin angular momentum, has moved from here to here.
注意l，旋转的角动量，已经从这移到了这。
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