因有限元法对网格无正交性要求，因而可在椭圆变换前后进行剪切和延伸变换。

Since FEM has no such requirement that the grid line are of orthogonality, a sequence of shearing and stretching transformation, both prior to and subsequent to the elliptic mapping is used.

youdao

因有限元法对网格无正交性要求，因而可在椭圆变换前后进行剪切和延伸变换。

Since FEM has no such requirement that the grid line are of orthogonality, a sequence of shearing and stretching transformation, both prior to and subsequent to the elliptic mapping is used.

youdao