fore-and-aft magnet

例句：

1. 1.The fore-and-aft magnet is a crucial component in the navigation system.
   前后磁体是导航系统的关键部件。
2. 2.The fore-and-aft magnet is responsible for aligning the plane's wings.
   前后磁体负责使飞机的机翼对准。
3. 3.The fore-and-aft magnet was designed to improve the stability of the aircraft.
   前后磁体被设计用来提高飞机的稳定性。