radial Fourier analysis

例句：

1. 1.Radial symmetry is a characteristic of many astronomical objects.
   径向对称是许多天体对象的特征。
2. 2.The radial growth pattern of the plant is very interesting.
   植物的径向生长模式非常有趣。
3. 3. The radial distribution of the stars in the galaxy is fascinating.
   银河系中恒星的径向分布令人着迷。