Some electrons, called free electrons, are free to move from atom to atom within a conductor .

半导体是否存在着自由电子，这取决于某些条件。

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In order to establish desktop big explosive device, the researchers used acrylic and gold, laser will play in gold above, inspired called plasma of free electrons wave.

为了建立台式大爆炸装置，研究人员使用了丙烯酸和黄金，将激光打在黄金之上，激发出被称为等离子的自由电子波。

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When the free electrons in a conductor move in one direction only. The current thus established is called a direct current, which is often abbreviated to DC.

当导体的自由电子只以一个方向运动时，这样产生的电流叫做直流电，常缩写为。

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To build their desktop Big Bang, the researchers arranged strips of acrylic and gold so that laser light hitting the gold excites waves of free electrons called plasmons.

FORBES: University of Maryland Researchers Build a Big Bang In Their Lab