Complex sentence: Following Fregat separation, the lander uses its own propulsion to enter the final Lunar Transfer Orbit and, after an overall transfer time of several weeks, injects itself into a polar orbit around the Moon.
Split into simpler sentences: Following Fregat separation, the lander uses its own propulsion to enter the final Lunar Transfer Orbit. Following an overall transfer of several weeks, the Lander injects itself into a polar orbit around the Moon.