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Here, free electrons rub off the con ductor and create a charge imbalance that causes the current flow.

这时,摩擦引起脱离导体,产生荷不平衡,从而产生流。

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Frequency-resolved measurement of the emission from a Eaman free electron laser under superradiation condition by a microwave grating spectrometer are presented.

本文报道了利用微波栅摄谱仪测量在超辐射工作条件下的喇激光器辐射谱的初步结果。

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The gain characteristics of the collective free electron laser operating in a superradiant amplifier have been studied through the variation of the interaction length and pumping magnetic field.

工作在超辐射模式下的集体区激光器的增益特性研究可以变互作用区长度及泵浦强度来进行。

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In the presence of impurities or in a nonstoichiometric solid, free electrons or electron holes are produced as a result of “charge compensation” to neutralize the effect of charged ionic defects 。

在杂质存在的情况下,或在非化学计量比的固体中,为了中和带离子缺陷所引起的荷不平衡,便会产生子空穴。

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And all those free electrons are great at conducting electricity.

而那电子有很好导电性。

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Scishow 精选系列

The free electrons in metals are especially good at this vibrating-to-match-visible-light thing.

电子和金属产生振荡与可见光波长匹配。

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Crash Course 天文篇

This was an important event! Free electrons are really really good at absorbing photons, absorbing light.

这是个大事件!电子非常擅长吸收光子,吸收光。

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日常生活高频词汇

To free electrons, something has to make them whirl fast enough to break away from their nuclei.

为了释放电子,必须使电子高速旋转而足以摆脱原子核束缚。

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Crash Course Physics 速成课物理

These moving electrons are called free electrons.

电子可以移动,称为 这移动电子:电子

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Crash Course 综合篇

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

所以我们有绝缘和导, 其中有电子在其中移动。

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Crash Course Physics 速成课物理

These extra free electrons want to move as far away from one another as possible.

额外电子会尽可能多地离开 彼此可能。

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科技智慧坊

We'll begin at the top with a device called a field emission source which generates free electrons.

我们将从顶部个称为场发射源设备开始,该设备可以产生电子。

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Crash Course 综合篇

And when we talk about an object having an overall positive charge, we mean it’s missing free electrons.

当我们谈论个整带正电荷时, 我们意思是它缺少电子。

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双语版 TED-Ed 演讲精选

As these free electrons rush from one electrode to the other, they collide with more neon atoms, causing them to ionize as well.

当这电子从电端涌向另端,它们会与更多氖原子碰撞,并使身也离子化。

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Crash Course Physics 速成课物理

And when we talk about an object having an overall positive charge, we mean it's missing free electrons.

当我们谈论个元素时 正总电荷,我们意思是

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生活大爆炸 第2季

Sheldon, I told you, I only have access to the free electron laser at night. I can't drive you for the next few weeks.

谢尔顿我跟你说过了,我只有晚上才能用电子激光仪。接下来几个礼拜我都不能开车送你了。

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Veritasium真理元素

And the amount of dispersion tells you how many free electrons that radio wave had to pass through to reach the detector.

色散量告诉您无线电波必须通过多少个电子才能到达检测器。

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Crash Course 综合篇

The kind of chemistry that happens inside of a battery is called electrochemistry because it involves reactions that produce or consume free electrons.

电池内部发生化学反应称为电化学,因为它涉及产生或消耗电子反应

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Crash Course Physics 速成课物理

To figure this out, let's imagine we have a conductive sphere with a net negative charge meaning it has too many free electrons.

为了找出答案,想象个带有总电荷携带球 负,意味着它有额外电子。

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Crash Course Physics 速成课物理

The answer is an imbalance of electrical charge, when some part of an object has a different number of free electrons than another part.

基本上?

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Plasma is kind of like a gas, except that its atoms have some of their electrons stripped off, so it's made up of positively-charged ions and a bunch of free electrons zooming around.

等离子就像种气,除了它原子上电子被扯下来了,所以它是正离子组成,再加上很多电子在旁边乱转。

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PBS太空科学

In the first few seconds after the Big Bang, the universe was a sea of free electrons and atomic nuclei, so unbelievably hot and dense that not even photons could escape that opaque cosmic pinball machine.

在大爆炸后最初几秒钟,宇宙是电子和原子核海洋,温度高得令人难以置信, 密度大到连光子都无法逃脱那台不透明宇宙弹球机。

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科技智慧坊

As these positively charged  helium nuclei are ejected at ludicrous speeds, the alpha particles run into atoms in the  atmosphere and knock off their electrons, thus creating positively charged nitrogen, oxygen,   other gasses, and thousands of free electrons.

当这带正电氦核以惊人速度被喷射出来时,阿尔法粒子会撞上大气中原子并撞击出电子,从而产生带正电氮、氧、其他气和数千个电子。

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3G, 401(K), a,
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