By seeing how in or out of phase two light waves  are, an observer can infer the relative speed of the waves.

通过观察两个光波的异，观察者可以推出光波的对速度。

The gravity waves moving through the inversion  created enough lift that a strong updraft was formed and it moved in phase with the peak of the  gravity wave.

通过反转的重力波产生了足够的升力，形成了强大的上升气流，并且与重力波的峰值移动。