rotary piston internal combustion engine

例句：

1. 1. The new carhas a rotary piston that makes it more efficient.
   这款新车采用了旋转活塞技术，使其更加高效。
2. 2. The rotary piston is the heart of the internal combustion engine.
   旋转活塞是内燃机的核心部件。
3. 3. The rotary piston design improves fuel efficiency significantly.
   旋转活塞的设计显著提高了燃油效率。