Magnets are very interesting objects. 磁铁是非常有趣的物体。

　　Each has a positive pole and a negative pole. 每个磁铁都有正负极。

　　One for each end. 磁铁两端各为一极。

　　Similar poles push each other away. 磁铁同极相斥，

　　Different poles pull each other closer. 异极相吸。

　　A compass is a kind of magnet and it is very useful. 指南针就是一种磁铁，而且非常实用。

　　With a compass we can easily find where we are. 利用指南针，我们可以轻易地发现我们的位置。