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单词 diffraction grating
释义 diffraction gratingn.(名词)
  1. A usually glass or polished metal surface having a large number of very fine parallel grooves or slits cut in the surface and used to produce optical spectra by diffraction of reflected or transmitted light.衍射光栅:一般为玻璃或光亮的金属面,面上刻有很密的很精细且互相平行的沟槽或狭缝,光线通过它或被它反射时就形成光谱
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