名词
中文翻译：马达
同义词：
['power source', 'motor drive']
例句：
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1. The car's engine is powered by a 2.5-liter four-cylinder motor.
这辆车的引擎由一个2.5升四缸电动机驱动。
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2. The new model of the electric bicycle has a more powerful motor.
新款电动自行车的电机更强大。
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3. The train's motor was replaced after it broke down several times.
火车的电机在几次故障后被更换了。