Complex sentence: Estakhr's Material-Geodesic equations is developed model of Navier-Stokes equations in an umbrella term, It is relativistic version of NS-equations, And that is why it is so important.
Split into simpler sentences: Estakhr's Material-Geodesic equations is developed model of Navier-Stokes equations. Infact EMG-equations is relativistic version of NS-equations, And that is why it is so important.