名词
中文翻译：动力效率
同义词：
['motor performance', "power efficiency例句：1. The car's motor efficiency is rated at 20%.（这辆车的发动机效率被评为20%。）"]
例句：
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1. The car's motor efficiency is rated at 20%.
这辆车的发动机效率被评为20%。
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2.To improve the efficiency of our production process, we need to invest in new technology.
为了提高我们的生产过程的效率，我们需要投资新技术。
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3.The efficiency of the new machine is much higher than the old one.
新机器的效率比旧机器高很多。