方程: equation的: 4次方是 The fourth power of 2 i ...法線: normal式: type; style直線的法線式: normal form of a straight line法線式: normal format表面的法線: normal to a surface曲面的法線: normal to a surface; normal to the surface曲線的法線: normal to a curve; normal to curve超曲面的法線: normal to a hypersurface（方程的）解: solution二次方程的: quadratic方程的次: degree of equation方程的端邊: member of an equation方程的根: equation root; root of equation方程的軌跡: locus of an equation方程的階: order of equation方程的解集: solution set of equation方程的設(shè)立: construction of equation方程的圖: graph of an equation; graph of equation方根；方程的根: root反轉(zhuǎn)已選擇的法線: flinormals selected曲面的法線矢量: normal vector of a surface曲面的法線向量: normal vector of surface曲線在一點的法線: normal line to a surface at a point
