名词
中文翻译：变速马达
同义词：
['speed regulator', 'variable speed motor']
例句：
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1.The car's speed-changer motor is a crucial component of its performance.
汽车的变速马达是其性能的关键组成部分。
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2. The engineer used the speed-changer motor to adjust the speed of the machine.
工程师使用变速马达来调整机器的速度。
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3. The speed-changer motor was designed to be easy to operate and maintain.
变速马达被设计为易于操作和维护。