And that force tends to cause it, if you have a moving charged particle, to deflect its trajectory and start rotating in a magnetic field.

这个力会产生这样的作用，有一个运动中的带电微粒，磁力会使其轨道偏转，并在磁场中做旋转。

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And, if you take a vector field where maybe everything is rotating, a flow that's just rotating about some axis, then you'll find that its divergence is zero.

如果取一个有旋的向量场，流体流动方向是环绕某个坐标轴的，那么就会发现它的散度是零。

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In the dynamo, mechanical energy is used for rotating the armature in the field.

在直流发电机中机械能用来使电枢在磁场中转动。

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The Great Irish Links Challenge is a 3-day affair, splitting the entire field into thirds each day and rotating, with one round on each course.

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