名词
中文翻译：Unknown
同义词：
['primary mover', 'primary engine']
例句：
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1.The car's prime mover is a powerful electric motor.
这辆车的主要动力源是一个强大的电动机。
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2. The new machine has a prime mover that can turn the whole system on and off.
这台新机器有一个可以启动整个系统的原动力。
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3. The prime mover of the train is the steam engine.
火车的原始动力是蒸汽机。