so you have a lot of experience with this in your real life.

所以说你在实际生活中有很多类似的体验
You've used a phone that has a wire on it, right?

你们用过那种有线的电话机对吧
Coil-- If we're just talking about elastic materials,

线圈如果我们只讨论弹性材料
that means materials that have the property of elasticity

也就是说具有弹性特质的材料
and they haven't been deformed beyond their elastic limit,

只要形变并未超出弹性限度
then I can stretch them, they'll come back, stretch them,

你就可以反复拉伸拉伸回缩
come back, and I can do that as many times as I want

无论我做多少次
and I'll always get the same material.

材料始终会恢复原样
You could classify materials that are elastic into different properties.

你可以将有弹性的材料单独归为一类
Now, we're not just thinking about rubber bands

现在你就不能仅仅局限于橡皮筋了
but we're thinking about every material.

而要看看所有的材料
Most materials have some elasticity

大多数材料都有一定的弹性