名词
中文翻译：活塞的数量
同义词：
['piston count', 'number of cylinders', 'number of strokes']
例句：
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1. Theengine has a large number of pistons to ensure smooth operation.
发动机拥有大量活塞以确保顺畅运行。
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2. The car's engine is designed with a high number of pistons for better performance.
汽车的引擎设计有高数量的活塞以获得更好的性能。
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3. The machine's design incorporates a large number of pistons to increase efficiency.
机器的设计包含了大量活塞以提高效率。