短語(yǔ)詞組短語(yǔ)polygonal approximation method 近似解的構(gòu)造polygonal l method 多角形法polygonal approximations method 折線(xiàn)逼近法Euler 's polygonal arc method 歐拉折線(xiàn)法polygonal finite element method 多邊形有限元 返回 polygonal method