• I am the spin angular momentum.

    就是旋转角动量

    youdao

  • It has spin angular momentum.

    旋转角动量

    youdao

  • Look at that spin angular momentum.

    观察那个旋转角动量

    youdao

  • Angular momentum is in this direction.

    角动量这个方向了。

    youdao

  • Angular momentum is now in this direction.

    角动量现在这个方向

    youdao

  • We have here the spin angular momentum that you saw.

    个旋转角动量,如你们所见

    youdao

  • So this was originally the spin angular momentum of the wheel.

    所以,原本旋转角动量

    youdao

  • I add angular momentum in this direction and you see that here.

    这个方向加入角动量你们可以在看到

    youdao

  • When I do that, I apply, I add angular momentum in this direction.

    这样做的的,我将角动量,这个方向

    youdao

  • And so the angular momentum of spin of the wheel is in this direction.

    所以旋转角动量这个方向

    youdao

  • But notice that l, the spin angular momentum, has moved from here to here.

    注意l旋转角动量已经移到了这。

    youdao

  • Therefore there is a total angular momentum which is the vectorial sum of the two.

    因此总的角动量,两个向量

    youdao

  • Therefore there is a total angular momentum which is the vectorial sum of the two.

    因此总的角动量,两个向量

    youdao

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