magnetic conductor

例句：

1. 1. The magnet attracts iron filings to it.
   磁铁吸引铁屑。
2. 2. Magnetic fields are used in navigation systems.
   磁场用于导航系统。
3. 3. The magnetized material has a strong magnetic field.
   被磁化的材料具有强烈的磁场。