1. In a wave trough I caught a glimpse of a coral head to port: a little too close for comfort.

2. What is an intended wave trough?

3. Physically, at a special critical wave speed the flow may have a naturally periodical separated-reattached pattern, with each wave trough capturing a stable vortex ring.

4. Fog frequency shows a pattern of two valleys at the beginning and ending of the 46-year period, and a wave trough in intermediate time series.

5. Utilizing the results above, the transverse stability is thoroughly studied in the condition of not only wave crest and wave trough at midship but also wave crest at the any vessel's position.

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6. The results indicate that the disintegration of the jet column is caused by the surface waves propagating along the jet body. The jet breaks up at the wave trough.

7. The pore pressure of seabed also shows the double crest variation and increases at wave trough.

8. Besides, the propagation speed will be different part of the wave, this leads to deformation of a wave trough or wedge in the course of motion.

9. In supersonic flow, results indicate that the disintegration of the jet column is caused by the surface waves induced by aerodynamic forces and the breakup point is at the wave trough.

10. We can clearly make a conclusion until the second wave crest or wave trough is formed.