Complex sentence: Once in orbit at 200 km and around 7.8 km/s velocity, the orbiter requires no further energy: it has kinetic energy of about 3 TJ and potential energy of roughly 200 GJ.
Split into simpler sentences: Once in orbit at 200 km and around 7.8 km/s velocity, the orbiter requires no further energy. At this altitude and velocity, the vehicle has a kinetic energy of about 3 TJ and a potential energy of roughly 200 GJ.