Can you make the magnetic field reverse?

你可以逆转磁场吗？

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If the ions are fast enough, this reverse field overcomes the original one, folding it back on itself and forcing the ions to return the way they came.

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However, after being sold to Morton instead, his career went into reverse as his off-field problems emerged.

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They tend, on balance, to point up, as this means that they are pointing in the same direction as the magnetic field a configuration that is much more stable than the reverse.

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