Complex sentence: TER is an acronym for "Transport express régional": the brand name used by France's national railway company, SNCF, to denote medium-distance passenger rail services within an administrative region of France.
Split into simpler sentences: TER is an acronym for "Transport express régional". It is a brand name used by France's national railway company, SNCF, to denote medium-distance passenger rail services within an administrative region of France.