pulsating magnetic field

例句：

1. 1.The heart is pulsating withexcitement.
   心脏在激动地跳动。
2. 2. The bloodvessels are pulsating with life.
   血管中充满了生命活力。
3. 3. Theocean waves are pulsating against the shore.
   海浪拍打着海岸，脉动不已。