名词
中文翻译：活塞环
同义词：
['pistonring', 'spark plug ring', "spark plug例句：1. The engine needsto be checked for any signs of wearon the piston rings.（发动机需要检查活塞环是否有磨损的迹象。）2. Themechanic replaced the worn piston rings with new ones.（机械师用新的活塞环替换了磨损的活塞环。）3. The car'sperformance was significantly improved after the pistonrings were replaced.（更换活塞环后，这辆车的性能显著提高。）"]
例句：
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1. The engine needsto be checked for any signs of wearon the piston rings.
发动机需要检查活塞环是否有磨损的迹象。
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2. Themechanic replaced the worn piston rings with new ones.
机械师用新的活塞环替换了磨损的活塞环。
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3. The car'sperformance was significantly improved after the pistonrings were replaced.
更换活塞环后，这辆车的性能显著提高。