permanent magnetization

例句：

1. 1.The new car has a permanent magnet engine that runs quietly without any noise.
   这款新车有一个永久磁铁发动机，运行安静无声。
2. 2.The scientist discovered the permanent magnetization of the earth's core.
   科学家发现了地球核心的永久磁化现象。
3. 3.Permanent magnetization is a phenomenon where the magnetic field remains strong even when the magnet is removed from its source.
   永久磁化是一种现象，即使磁铁从其来源中移除，磁场仍然保持强烈。