And we cleared out all the white dielectric material from inside the horn.

我们把喇叭内所有 白色介电材料都清理掉。

They climbed back into the dish with brooms and scrubbing brushes and carefully swept it clean of what they referred to in a later paper as white dielectric material, or what is known more commonly as bird shit.

他们拿起扫帚和抹布再次爬进抛物面天线，小心翼翼地把他们后来在一篇论文中称之为白色电介质的、用更通常的说法是鸟粪的东西扫得干干净净。

At each end of the  transmission line is a plant filled with pumps and tanks to pressurize - and often to  circulate - the dielectric oil in the pipe.

在输电线路的每一端都有一个装满泵和油箱的设施，用于给管道中的电介质油加压，通常还会循环这些油。

Today here at Crash Course Chemistry we learned about some of the properties of water that make it so special: it's polarity and it's dielectric property.

天在《 Crash Course 》中，我们水的一些特殊性质：它的极性和介电性质。

Second, it's composed of three functional sections, a gate, a charge trap, and a channel, with dielectric barriers used to separate each section.

第二， 它由三个功能部分组成，包括一个栅极、一个电荷陷阱和一个通道，并使用介电屏障将各部分隔开。

And what happens is as that field moves through the dielectric, what it does is shifts the electrons.

当电场穿过电介质时，它会移动电子。

And the molecules that make up dielectrics are polar, which means one side of the molecule is slightly positive while the other side is slightly negative.

构成绝缘体的分子是极性的，这意味着 分子的一端是正的，而另一端是负的。

54. Question: How does the choice of PCB laminate material influence the performance of high - speed PCBA? Answer: High - speed PCBA requires laminate materials with low dielectric loss and stable electrical properties to minimize signal attenuation and distortion.

54. 问题：PCB 层压板材料的选择如何影响高速 PCBA 的性能？答案：高速 PCBA 需要具有低介电损耗和稳定电气性能的层压材料，以最大限度地减少信号衰减和失真。

We call this it's dielectric property.

我们称之为介电特性。

Over hundreds or thousands of cycles of TMB, the paper insulation around each conductor  can begin to soften or tear, eventually leading to a dielectric breakdown (in other words, arcs and short circuits).

经过数百或数千次 TMB 循环，每个导体周围的纸绝缘体可能会开始软或撕裂，最终导致介电击穿（换句话说，电弧和短路）。

Now if we take a dielectric and slide it in the middle, well this dielectric is just free space.

现在如果我们取一个电介质并将其滑到中间，这个电介质其实就是自由空间。

29. Question: What is the key factor to consider when choosing a PCB material for high - frequency applications in PCBA? Answer: Low dielectric constant and low dissipation factor to minimize signal loss.

29. 问题：为 PCBA 中的高频应用选择 PCB 材料时要考虑的关键因素是什么？答案：低介电常数和低耗散因数，可最大限度地减少信号损失。

Circulating the dielectric oil helps to keep  the temperature within the pipe consistent along the line, but can't control how that average  temperature changes over time.

循环绝缘油有助于保持管道沿线的温度一致，但无法控制平均温度随时间的变。

And so we now see that we have a dielectric constant that is going to be higher than our constant which was 1.

我们现在看到电介质常数将会高于我们之前的常数1。

And this something is called a dielectric – typically an insulating material like plastic or glass.

这种东西叫做绝缘体。通常，它是 它是一种绝缘材料，例如塑料和玻璃。

So dielectrics can help capacitors hold even more energy.

所以电介质有助于电容器存储更多 的能量。

And if I pull that dielectric out then our capacitance dropped down to 0.

而且如果我把那个电介质抽出来，那么我们的电容就会降到0。

Once the steel pipe is fully welded closed, it's slowly filled with a non-conductive  oil known as liquid dielectric.

一旦钢制管道完全焊接封闭，就会慢慢填充一种称为液态电介质的非导电油。

And that's why the full equation for capacitance includes a dielectric constant, K.

因此，全电容方程包含一个常数 隔离，K。

And so what happens when we add a dielectric in the middle, when we add an insulator in the middle?

当我们在这中间加入一个电介质，也就是加入一个绝缘体时，会发生什么？