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

为使旧建筑更节，木材是很好的绝缘体。

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

它们彼此之间互不连接，因此为了绝缘体。

President Trump, I think, is an equal opportunity insulter.

我认为，特朗普总统是一个机会均等的绝缘体。

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

事实证明，杜仲胶是海底电缆的绝佳绝缘体。

Powdery or soft, the substance provides an excellent source of insulation.

粉末状或是柔软的这种物为绝好的绝缘体。

Your body creates its own warm bubble of air just above the skin thanks to conduction.

由于传导，你的身体会在皮肤生热气绝缘体。

Myelin acts like insulation, just like on an electrical wire that helps the impulse travel more quickly.

髓鞘就像绝缘体，就像电线一样，帮助脉冲更快地传播。

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绝缘体，但其表面仍可带一支电流。

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

一个拓扑绝缘体就像两个同时起作用，而这在过去被我们认为是不可的。

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

好吧 开始课 请举手告诉我 在座的哪位对拓扑绝缘体的概念比较熟悉？

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

而在橡胶一类的绝缘体中，电子实际根本无法流动。

They're also good insulators for heat and electricity.

它们也是热和电的良好绝缘体。

Her nose looked like a porcelain insulator.

她的鼻子看起来像瓷绝缘体。

Aerogels are great for insulation, because the air inside doesn't transfer heat very well.

气凝胶是绝佳的绝缘体，因为其内部气体不太导热。

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

在橡胶等绝缘体中，电子根本无法流动。

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

空气是绝缘体，负责将电流限制在导体内。

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

我们经营相当数量的瓷砖，以及电器用品的绝缘体。但是厨房用具和餐具是本公司主要系列品。

Diamonds are electrical insulators, not conductors.

钻石是电绝缘体， 而不是导体。

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

这是因为空气通常是极好的绝缘体，可以防止电荷重新结合。

You might notice small devices hanging near the insulators at each pole.

您可会注意到每根杆的绝缘体附近都悬挂着小型设备。