highly efficient 4-stroke low-speed diesel engine

例句：

1. 1. The new high-efficiency 4-stroke diesel engine significantly reduces fuel consumption and emissions.
   这款新型高效四冲程柴油发动机显著降低了燃油消耗和排放。
2. 2. The company's latest model is a highly efficient 4-stroke diesel engine that can runon alternative fuels.
   该公司的最新型号是一款高效四冲程柴油发动机，可以在替代燃料上运行。
3. 3. The engineer explained how the highly efficient 4-stroke diesel engine works to power the factory's machinery.
   工程师解释了如何高效四冲程柴油发动机工作来为工厂的机器提供动力。