magnetic current

例句：

1. 1. The magnetized iron bars are used to create a magnetic field around the machine.
   被磁化的铁条被用来在机器周围创建一个磁场。
2. 2. The magnetic field is strong enough to attract metal objects.
   磁场足够强，能够吸引金属物体。
3. 3.The magnetic field current in the Earth's core is responsible for the movement of the planets.
   地球核心的磁场电流负责行星的运动。