a sound mind in a sound body
collision theory hard sphere theory
hard sphere theory collision theory
lipoid-sieve theory lipoid-filter theory
TRIZ theory of inventive problem solving theory
TRIZ发明问题解决理论理论
TRIZ理论发明问题解决理论
500 hPa northern polar vortex
adiabatic invariant of vortex
Air Jet Vortex Spinning
air-entraining vertical vortex
Air-jet Vortex Spinning
Analysis of vortex configuration
Antarctic stratospheric circumpolar vortex
antarctic stratospheric vortex