         Sentence 1: What is-a turbine’s theoretical  Carnot ‘efficiency? «    Sentencé © 2°°This.: low . turbiné. entry  temperature’ [compared with. a: jas  turbine): is why. the Rankine cycle is often  used..as a bottorning. cycle’ in: combined-  cycle gas: turbine power pacenel el are  needed] :    