And for retrofitting older buildings to be more energy effcient, wood is a good insulator.

为使旧建筑更节能，木材是很好。

Since these are not connected to each other, the result is an insulator.

它们彼此之间互不连接，因此成为了。

It also turned out that gutta percha was a great insulator for undersea cables.

事实证明，杜仲胶是海底电缆佳。

And since asphalt is an insulator, it traps that heat over the course of the day.

因为沥青，昼捕热。

Most of the material is an insulator, but its surface can carry an electric current.

大部分这种材料都是一个，但其表面仍可带一支电流。

The Earth's crust is an incredible insulator, and it keeps this massive, inexhaustible heat source beneath us invisible.

地壳隔热果很棒，能让这个巨大、用之不竭地底热能来源不被注意到。

A topological insulator acts like both at the same time, which we used to think was impossible!

一个拓扑就像两个同时起作用，而这在过去被我们认为是不可能。

All right, let's begin. Show of hands, who here is familiar with the concept of topological insulators?

好吧 开始上课 请举手告诉我 在座哪位对拓扑概念比较熟悉？

And in an insulator, like rubber, electrons can't really flow at all.

而在橡胶一类中，电子实际上根本无法流动。

Someone douses the fire, and she lowers the pot into an insulator they made out of clay and straw.

有人把火弄熄，她把锅子放到他们自己做保温器里头，是用泥土和草做成。

They're also good insulators for heat and electricity.

它们也是热和电良好。

Now, while chemically pure water is an insulator, most water is impure.

现在， 虽然化学纯水是，但大多数水都是不纯。

Diamonds are electrical insulators, not conductors.

钻石是电， 而不是导。

Well, you need a better insulator than just air.

嗯，你需要一个比空气更好。

The  air is the insulator doing the job of keeping electricity constrained within the conductors.

空气是，负责将电流限制在导内。

We do a fair amount in tiles and in insulators for electrica appliances. But kitchenware and tableware are our mainlines.

我们经营相当数量瓷砖，以及电器用品。但是厨房用具和餐具是本公司主要系列产品。

Her nose looked like a porcelain insulator.

她鼻子看起来像瓷。

And in an insulator, like rubber, electrons can’t really flow at all.

在橡胶等中，电子根本无法流动。

It's because air, usually an excellent insulator, prevents the charges from recombining.

这是因为空气通常是极好，可以防止电荷重新结合。

So an insulator prevents electrons from crossing the gap.

所以阻止电子通过 差距。