Complex sentence: A Stewart platform is a type of parallel robot that has six prismatic actuators, commonly hydraulic jacks or electric actuators, attached in pairs to three positions on the platform's baseplate, crossing over to three mounting points on a top plate.
Split into simpler sentences: A Stewart platform is a type of parallel robot that incorporates six prismatic actuators, commonly hydraulic jacks or electric actuators. These jacks or actuators are mounted in pairs to the mechanism's base, crossing over to three mounting points on a top plate.