词汇	ortho nitrogen
释义	ortho nitrogen n.正氮
随便看	universal coordinator routine universal copying device for camera Universal Copyright Convention universal copyright convertion universal cord universal cord circuit universal cord for fiberscope universal cord pair universal correlation function universal counter universal coupler universal coupling universal-coupling universal coupling constant universal couplings with sealed bearing universal coupling with spider universal coverage universal coverage multiplex universal covering universal covering group universal covering manifold universal covering space universal covering surface universal crane universal credit