单词	characteristic radiation
释义	characteristic radiation noun : radiation in the form of light or X rays of wavelengths peculiar to the substance emitting or absorbing it Word History First Known Use 1898, in the meaning defined above
随便看	etatist etc. etcetera etceteras etch etch figure etchant etchants etched etched in stone etched-out Etchemin etchemins etcher etchers etches etching etching ball etching figure etching needle etching press etchings ETD etens Eteocretan

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