磁场对运动电荷的作用洛伦兹力。

The function magnetic field impose on the electric charge.

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负电荷在运动，它们处在一个环形的轨道中。

You've got negative charge in motion, and it's in a circular orbit.

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负电荷在运动，它们处在一个环形的轨道中。

You've got negative charge in motion, and it's in a circular orbit.

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