piston unit area power

例句：

1. 1. The engine's piston unitarea power is measured in horsepower.
   发动机的活塞单元面积功率以马力为单位。
2. 2. Thedesign of the piston unit area powergreatly affects the performance of the engine.
   活塞单元面积功率的设计对发动机的性能有很大影响。
3. 3.In order to improve the efficiency of thepiston unit area power, we needto optimize the design of the engine.
   为了提高活塞单元面积功率的效率，我们需要优化发动机的设计。