plane wave Born approximation

例句：

1. 1.The waves on the surface of the water are smooth and steady.
   水面上的波浪平滑而稳定。
2. 2. The sound of the waves crashing against the shore is soothing.
   海浪拍打岸边的声音很舒缓。
3. 3. The plane wave travels at the speed of light.
   平面波以光速传播。