翻译:平面曲线的顶点 同义词1)vertex of plane curve,平面曲线的顶点2)planar point of a surface,曲面的平点3)vertex of a quadric,二次曲面的顶点4)vertex of a conic,二次曲线的顶点5)flat-topped curve,平顶曲线6)ary point on a curve,曲线的平稳点