Generally speaking, polarity does not remain only on one side of the pole forever; it vacillates from one side unto the other and should in fact have equal time, energy and focus on both sides .

• 一般而言，极性不会总是只停留在磁极的一边；它会从一边摇摆到另一边并事实上应该是以均等的时间和能量摇摆且聚焦在两边。