| 单词 | laser |
| 释义 | laser /lay"zeuhr/, n. Physics. a device that produces a nearly parallel, nearly monochromatic, and coherent beam of light by exciting atoms to a higher energy level and causing them to radiate their energy in phase. Also called optical maser. [1955-60; l(ightwave) a(mplification by) s(timulated) e(mission of) r(adiation)] |
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