sentences: longitudinal waves travel through pattern of compressions and rarefactions
docs: light_propagation_through_liquid is wave_propagation. shock_wave is wave_propagation. tensility_of_suspension_cable is throughly. turbulent_flow is flow. trajectory_swept_space is localized_spatial_thing. oscillating_trajectory is trajectory. image_compression is compression. wave_cycle is wave_propagation. sounds is longitudinal_waves. scattering is movement_process.