Complex sentence: This is the case with the USS "Excelsior" (NX-2000), a testbed for transwarp drive: although the transwarp drive failed to achieve its intended goals, the ship was refitted and recommissioned as NCC-2000.
Split into simpler sentences: This is the case with the USS "Excelsior" (NX-2000), a testbed for transwarp drive. Although the transwarp drive failed to achieve its intended goals, the ship was refit and recommissioned as NCC-2000.