名词
中文翻译：自驾汽车发动机
同义词：
['self-propelled motor', 'self-powered motor']
例句：
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1.The self-drive car is a convenient mode of transportation.
自驾汽车是一种便捷的交通工具。
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2. The self-drive motor has been upgraded to improve fuel efficiency.
自驾汽车的发动机已经升级，以提高燃油效率。
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3. The self-drive motor is powered by electricity and can be operated without a driver.
自驾汽车由电力驱动，无需驾驶员操作即可行驶。