At extremely cold temperatures, it goes quantum: it exists in an oscillating waveform spanning an excited state, an unexcited state, or both simultaneously, all controlled by electrical currents.

在极低的温度下，它发生量子：它存在于一个振荡波形中，波形可能呈现激发态、未激态、或两者同时兼具，这都取决于电流的控制。

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This stimulated emission is the opposite of (stimulated) absorption, where unexcited matter is stimulated into an excited state by a light wave.

这受激放射是绝对的，在那里(安慰)吸收不活泼的物质是一种兴奋安慰而由轻波形态。

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When an electron drops back from an excited to an unexcited state, it gives out light.

ECONOMIST: Optoelectronics

This means that so many electrons were pumped up into an excited state by the laser that more were in that excited state than in their normal, unexcited state.

ECONOMIST: Optoelectronics