Complex sentence: An Advanced Uniflow Steam Engine has been built to overcome some of the limitations of traditional steam engines, which were prematurely stopped in development upon the introduction of the more efficient diesel engine (1) and steam turbine in the early 1900s.
Split into simpler sentences: An Advanced Uniflow Steam Engine has been built to overcome some of the limitations of traditional steam engines. In the history of the steam engine, development was prematurely stopped upon the introduction of the more efficient diesel engine (1) and steam turbine in the early 1900s.