名词
中文翻译：马达
同义词：
['engine', 'motor', 'power source']
例句：
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1. The car has a powerful motor that can reach high speeds.
这辆车有一个强大的发动机，可以高速行驶。
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2. The old steam engine is still in use today.
旧蒸汽引擎至今仍在使用。
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3. The new electric motor is quieter and more energy-efficient than the old one.
新型电动机比旧的更安静、更节能。