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单词	Littrow spectrograph
释义	Littrow spectrograph noun Lit·​trow spectrograph ˈli‧ˌtrō- : a spectrograph in which dispersion is produced by a prism backed by a reflecting metallic film so that the light traverses the prism twice Word History Etymology after Joseph Johann von Littrow †1840 Austrian astronomer and mathematician
随便看	Bechuanaland bechuanas beck beck, isle of Becke test becked beckelite Becken Beckenham Becker becker Becker muscular dystrophy becker's muscular dystrophy becket becket bend beckets Beckett beckettian becketts Beckford Beckham becking beckiron beckite Beckley

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