名词
中文翻译：Unknown
同义词：
['mean velocity', "average velocity例句：1. The car's mean piston speed is 60 miles per hour.（这辆车的平均活塞速度是每小时60英里。）2. The engineer calculated the mean piston speed of the engine.（工程师计算了发动机的平均活塞速度。）"]
例句：
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1. The car's mean piston speed is 60 miles per hour.
这辆车的平均活塞速度是每小时60英里。
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2. The engineer calculated the mean piston speed of the engine.
工程师计算了发动机的平均活塞速度。
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3. The team needs to improve their mean piston speed to compete better.
团队需要提高他们的平均活塞速度以更好地竞争。