Complex sentence: The Falcon 9 versions are Falcon 9 v1.0 (retired), Falcon 9 v1.1 (retired), and the current Falcon 9 Full Thrust, a partially-reusable launch system; this a capability is currently unique in the world.
Split into simpler sentences: The Falcon 9 versions are Falcon 9 v1.0 (retired), Falcon 9 v1.1 (retired), and the current Falcon 9 Full Thrust. It is a partially-reusable launch system, a capability currently unique in the world.