A laser is a narrow beam of concentrated light produced by a special machine. It is used for cutting very hard materials, and in many technical fields such as surgery and telecommunications.
例句
...new laser technology...新的激光技術(shù)Researchers realised that a tunable laser beam might be useful in surgery.研究人員意識到，可調(diào)諧激光束也許可以用在外科手術(shù)中。
N-COUNT
激光器
A laser is a machine that produces a laser beam.
例句
...the first-ever laser, built in 1960.有史以來第一臺激光器，于1960年制造
英漢詞典釋義
n.
激光
We keep a laser record.我們保存激光唱片。
英英詞典釋義
Noun
1. an acronym for light amplification by stimulated emission of radiation; an optical device that produces an intense monochromatic beam of coherent light
行業(yè)詞典
醫(yī)學(xué)： light amplification by stimulatedemission of radia-tion激光，激光器：一種能在一切可見光區(qū)域內(nèi)把不同波長的光轉(zhuǎn)變?yōu)闃O強的、細(xì)而幾乎無發(fā)散的單色輻射光束的儀器，當(dāng)聚焦在一個狹小范圍內(nèi)時，能放出巨大的熱和能量，可用作外科處理、診斷和生理研究的工具；