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1·A bar on horseshoe magnet is called a permanent magnet.

棒形或马蹄形磁体称为永磁体。

2·The magnetic state of a bar magnet or a horseshoe magnet is extremely complicated.

条形磁铁或马蹄形磁铁的磁态是极其复杂的。

3·The bottom part of the hanging wire is placed between the poles of a small horseshoe magnet.

悬挂着的导线下端放在一个小型马蹄形磁铁的两个磁极之间。

4·These eddy currents are in such a direction as to cause the disk to follow the rotation of the horseshoe magnet.

这些涡旋电流的方向能够引起圆盘跟随马蹄形磁铁旋转。