1·Making an electromagnet at home is fun and easy.
在家做一块电磁铁是既简单又有趣的。
2·The shredded material goes back on the belt, where an overhead electromagnet removes material containing iron as the waste moves along.
被粉碎的部分再次回到传送带上，那里有一个电磁铁，把带铁的东西拿走，剩下的继续前进。
3·An electromagnet is a device whose magnetism is produced by an electric magnet.
电磁铁是一种由充电的磁铁产生磁力的装置。
4·An electromagnet is a device whose magnetism is produced by an electric magnet.
电磁铁是一种由充电的磁铁发生磁力的安装。
5·Therefore, the cooling effect of the electromagnet is an important factor to keep the magnetic field strength not decreasing rapidly.
因此，电磁铁好的冷却散热效果是保持其场强不急剧减弱的重要因素。