90 Magnets-Mid

Magnets Written by Katherine Follett

凯瑟琳·福莱特《磁铁

You have probably used magnets. Most magnets are made of metal. They come in many shapes and sizes. But how do magnets work? How do we use magnets? Read on to find out.

你可能用过磁铁。 大多数磁铁都是金属做的。 它们的形状和大小各不相同。 但是磁铁是如何工作的呢?我们如何使用磁铁? 往下读吧。

A force pushes or pulls something. Magnets have a special kind of force. Magnets pull some kinds of metal. They also push and pull other magnets. Magnets cannot push or pull wood, plastic, or glass.

一种力推或拉某物。 磁铁有一种特殊的力。 磁铁能吸引某些金属。 它们还会推和拉其他磁铁。 磁铁不能推动或拉动木头、塑料或玻璃。

All magnets have two ends, called poles. One end is the north pole. The other end is the south pole. The north pole of one magnet will attract the south pole of another magnet. This means they will pull together.

所有磁铁都有两端，称为磁极。 一端是北极。 另一端是南极。 一个磁体的北极会吸引另一个磁体的南极。 这意味着他们会齐心协力。

Two poles that are the same repel. This means they push each other away. It is hard to make two north poles or two south poles touch.

相同的两极相斥。 这意味着它们会相互推开。 使两个北极或两个南极接触是很难的。

Magnets can move things without touching them. How can they do that? The force in magnets flows in lines. These lines of force flow through and around a magnet. They flow out of the north pole. They flow back in at the south pole.

磁铁可以在不接触物体的情况下移动物体。 他们怎么能那样做呢?磁体中的力呈直线流动。 这些力线在磁铁周围流动。 它们从北极流出。 它们在南极回流。