翻译:奇异二次曲面 同义词1)degenerate quadrics,奇异二次曲面2)nonsingular quadric,非奇异二次曲面3)r-fold singular quadric,ｒ重奇异二次曲面4)non-singular conic,非奇异二次曲线5)singular quadric hypersurface,奇二次超曲面6)singular surface,奇异曲面