Original sentence: Seifallah Randjbar-Daemi's contrubutions are in the area of theoretical high energy physics, quantum field theory, superstring theory, supersymmetry and supergravity theories in all dimensions and cosmology
Edited sentence: Seifallah Randjbar-Daemi's contributions are in the area of theoretical high energy physics, quantum field theory, superstring theory, supersymmetry and supergravity theories in all dimensions and cosmology