这块在船上得铁引起罗盘磁针的背离。

The iron in the ship caused a deviation of the magnetic needle of the compass.

结论头穴脉冲磁针治疗急性脑梗死的作用等同于常规针刺头穴的治疗，优于静磁针的头穴治疗。

Conclusion Pulse magnetic acupuncture and routine acupuncture at scalp acupoints have same therapeutic effect on acute cerebral infarction, which is superior to that of static magnetic acupuncture.

臣心一片磁针石，不指南方不肯休。

Chen Xin Shi a needle, not to the South would not take.

一根磁针的磁极作用，无论正负都是一样的真实。

The action of the negative pole of a magnetic needle is just as real as the action of the positive pole.