1. The positive and negative shows a spatial wave train character vary with the season. The longitudinal gradient of Q is weak in summer, but strong and diversity in winter.

2. As the ion inertial length increase, the wave train becomes broader and the number of oscillation periods in the wave train are reduced.

3. An acoustic full wave train is received when borehole is filled with water.

4. Light waves are synchronized, the beam is a wave train.

5. The transmitted wave usually evolves into a single peak soliton with an oscillating tail which is found to decay rapidly, and the reflected wave into a slowly decaying wave train.

6. However, the pure IOD (Indian Ocean Dipole) and pure ENSO are difficult to excite teleconnection wave train in the Southern Hemisphere, which further confirms the interaction between them.

7. In 1988(), the low frequency eddies over middle and high latitudes propagate southward to the South China Sea although the wave train is not so active as in 1985.

8. As a result, the layer structure of the discontinuity becomes a wave train with the increase of ion inertial length.

9. A relation between generation of laser plasma and laser wave train length is obtained.

10. Keep in mind that an idealized monochromatic plane wave must be depicted as an infinite wave train.

11. Keep in mind that an idealized monochromatic wave must be depicted as an infinite wave train.

12. In this paper, the correlations between large scale topography, heating source and characteristics of meridional wave train in teleconnection are also discussed.