ferro-magnetic material

例句：

1. 1. The magnetized iron core iscrucial for the operation of the generator.
   磁化的铁芯对于发电机的运行至关重要。
2. 2. Thesteel plates used in the construction are madefrom ferro-magnetic materials.
   建筑中使用的钢板是由铁磁性材料制成的。
3. 3. The newdesign uses a ferro-magnetic materialto enhance its durability and performance.
   新设计使用了铁磁性材料来提高其耐用性和性能。