These can be used to study the rapid processes that can take place when electrons move or change energy.

阿秒光脉冲用于测量移动或能量变化的快速过程。

Patrick has tried to force one of those cell phone camera things on Ove, but he doesn't trust them.

帕特里克想给他装个什么移动相册，但欧维信不过这种东西。

Maybe, instead, the electrons themselves were being moved around.

相反，也许本身在四处移动。

The spinning magnet causes electrons to move in the wires and produce an electrical current.

旋转的磁铁使在导线中移动并产生流。

Now e mail and cell phones are rapidly replacing the old forms of communication.

现在邮件和移动话正在迅速取代旧的通讯方式。

How easy it is for electrons to move around depends on the material.

容易移动 取决于材料。我们描述。

It consisted of fast-moving electrons, situated between the two previously known Van Allen Belts.

它由快速移动的组成，位于已为人们所熟知的两个范艾伦带之间。

Electric current, anything from static electricity to lightning bolts, is electrons moving from negative to positive.

从静到闪的任何流都是从负向正移动。

This moving sea is a big part of what makes metals… metal.

这种移动的是金属的重要组成部分。

And emf, you’ll recall, stands for electromotive force, which is what causes electrons to move and form a current.

动势，你会记得，代表动势，这是导致移动并形成流的原因。

The user does this by moving the two sticks on a special electronic surface.

用户通过在一个特殊的表面上移动两根棍来做到这一点。

While the electrons move toward the middle, the positive gas ions head the other way.

当向中间移动时， 正气体离向另一方向移动。

In solid materials, protons stay fixed, but some electrons are free to move around.

在固体材料中， 质保持固定， 但一些可以自由移动。

So we’ve got insulators and conductors with free electrons moving around in them.

所以我们有绝缘体和导体， 其中有自由在其中移动。

These moving electrons are called free electrons.

可以自由移动，称为 这些移动的：。

And emf, you'll recall, stands for electromotive force, which is what causes electrons to move and form a current.

你会记得，动势代表动势，它是导致移动并形成流的原因。

The electrons that move along an alternating current, on the other hand, periodically and consistently change direction.

另一方面，在交流中移动的会周期性地、持续地改变方向。

After all, the current is made up of negatively charged electrons moving through the wire.

毕竟流是负向存在的 带的在导线中移动。

And when fast-moving electrons strike something in a vacuum, it generates X-rays.

当快速移动的撞击真空中的某物时，它会产生 X 射线。

They cite China's higher mobile share of e-commerce—90% versus 43% in America (see chart 2).

他们指出中国移动商务占比达到90%，远高于美国的43％（见图表2）。