词汇	old age grouping
释义	old age grouping 老龄划分
随便看	electron multiplication electron multiplicity electronmultiplier electron multiplier electron multiplier amplifier electron multiplier photocell electron-multiplier phototube electron-multiplier photo tube electron multipliers electron multiplier section electron-multiplier section electron multiplier tube electron-multiplier tube electron multiplier tube, dynamic electron multiplier tube electrode arrangement electron multiplying charge coupled device electron multiplying charge-coupled device Electron-nasopharyngolaryngoscopy electronnegative electron-negative electron negative atom electron negative potential electron negativity electronnegatiyity electronneutrino