Partition setting winding corotation and kickback.

分段设定，转。

The corotation circle acts as an interface that can either reflect or transmit these waves, allowing them to gain energy at the expense of the global rotational kinetic energy of the galaxy.

共同旋转圈的作用，像个可以射或透射这些波的介面，让它们转整体的转动动能为自身的能量。