For the other four leaf shapes - spathulate, denta-spathulate, cello-shaped and deltoid - more segments of Bezier curves were necessary for a good fitting.

• 对于三角形、匙形、齿匙形、提琴形等四种叶形来说，其误差较大，这些类型的叶片宜以多段的贝氏曲线进行几何模拟，以准确地逼近实际的叶片形状。