这是一张旋转椅，可以用来评估战场上遭受震荡而中耳损伤的士兵情况。

The rotary chair is used to assess middle ear injury of soldiers who may have experienced a concussion.

youdao

所以，这是原本的旋转的，角动量。

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

youdao

我们记得，这是个以单位速度旋转的向量场。

Remember that was the vector field that looked like a rotation at the unit speed.

youdao

So all that Bohr, for example, had to go on at this point was a more classical picture of the atom, as you can see on the left side of the screen there, which is the idea that the electrons orbiting the nucleus.

原子的经典图像，你们可以,看到屏幕左边，这是电子，绕着核子旋转，的概念,他已经知道。

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