名词
中文翻译：Unknown
同义词：
['rotary piston engine body', 'rotary pistonengine shell']
例句：
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1.The new car has a rotary piston engine that is much more efficient thanthe old one.
这款新车采用了旋转活塞发动机，比旧款更高效。
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2. Theengineers spent hours designing and testing therotary piston engine for the newaircraft.
工程师们花费了数小时设计并测试了这款新型飞机的旋转活塞发动机。
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3. The rotary piston enginewas a major innovation in the automotive industry at the time.
旋转活塞发动机是当时汽车工业的一项重大创新。