名词
中文翻译：引擎油垢
同义词：
['engine oil', 'engine oil buildup', 'engine oil deposits']
例句：
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1. The old car's engine was covered in engine conk.
那辆旧车发动机上满是油垢。
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2.Engine conk can be a sign of poor maintenance.
油垢可能是维护不善的标志。
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3. To keep the engine running smoothly, it's important to regularly clean out engine conk.
为了让发动机运行顺畅，定期清理油垢是很重要的。