平面上的用英语怎么说？

平面上的

例句

• Aspline curve is presented which interpolates given points and tangent directions with piecewise involute of circle. 利用拼接的圆渐开线实现对平面上的数据点及其切向的插值.
• Points in the physical plane are mapped onto corresponding points in the hodograph plane. 物理平面上的点被映射到速端曲线平面上的对应点.