单词	dihedral
释义	dihedral noun di·​he·​dral (ˌ)dī-ˈhē-drəl  1 : dihedral angle 2 : the angle between an aircraft supporting surface (such as a wing) and a horizontal transverse line Word History First Known Use circa 1911, in the meaning defined at sense 1 Phrases Containing dihedral dihedral angle dihedral angle
随便看	gainfulness gainfulnesses gaingiving gaingivings gaining gaining ground gaining machine gaining on gainings gainless gainlesslier gainlessliest gainlessness gainlier gainliest gainlinesses gainly gainor gains gains ground gains on gainsaid gainsay gainsayer gainsayers

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