magnetic pole       
noun [ C ]  physics specialized uk/mæɡˌnet.ɪk ˈpəʊl/ us/mæɡˌnet̬.ɪk ˈpoʊl/
 磁极
a point on the earth near the North Pole or the South Pole that a compass shows as north or south. These points are not directly opposite each other.
  The magnetic poles are the positions towards which the needle of a magnetic compass will point.
 - More examples
 - The magnetic poles are close to, but not the same as, the north and south geographic poles.
 - This results in a reversal of the North and South magnetic poles .
 - Being with Brian was like two magnetic poles trying to resist each other.