去掉外力后，由于磁系统的磁极相互排斥，磁力将使磁体恢复到磁能最低的状态。
Remove the foreign forces, because the magnetic pole mutually exclusive, magnetic magnet will return to the status of the lowest magnetic energy.
去掉外力后，由于磁系统的磁极相互排斥，磁力将使磁体恢复到磁能最低的状态。
Remove the foreign forces, because the magnetic pole mutually exclusive, magnetic magnet will return to the status of the lowest magnetic energy.
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