名词
中文翻译：活塞环
同义词：
['piston', 'cylinder ring', 'valve ring例句：1. The piston ringis essential for preventing oil from leakinginto the engine.（活塞环对于防止油泄漏到发动机中至关重要。）2. Thepiston ring was designedto reduce friction and improve engineperformance.（活塞环的设计旨在减少摩擦并提高发动机性能。）3. The piston ringwas replaced after several months of use dueto wear and tear.（由于磨损，几个月的使用后更换了活塞环。）']
例句：
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1. The piston ringis essential for preventing oil from leakinginto the engine.
活塞环对于防止油泄漏到发动机中至关重要。
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2. Thepiston ring was designedto reduce friction and improve engineperformance.
活塞环的设计旨在减少摩擦并提高发动机性能。
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3. The piston ringwas replaced after several months of use dueto wear and tear.
由于磨损，几个月的使用后更换了活塞环。