名词
中文翻译：发动机粗糙度
同义词：
['roughness of the engine']
例句：
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1.The new car has a much smoother engine than its predecessor.
这款新车的发动机比前一代更加平滑。
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2. Engineers need to carefully control the roughness of the metal surface during machining.
工程师在加工过程中需要仔细控制金属表面的粗糙度。
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3.The manufacturer's specifications for engine roughness are very strict.
制造商对发动机粗糙度的规格要求非常严格。