I add angular momentum in this direction and you see that here.
我在这个方向加入了角动量，你们可以在这看到。
Angular momentum is now in this direction.
角动量现在是在这个方向。
Angular momentum is in this direction.
角动量是这个方向了。
When I do that, I apply, I add angular momentum in this direction.
当我这样做的的是，我将角动量,加到这个方向。
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。
Torque is in this direction; spin angular momentum's in this direction.
力是这个方向，旋转角动量是这个方向。
Torque is in this direction; spin angular momentum's in this direction.
力是这个方向，旋转角动量是这个方向。
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