名词短语
中文翻译：真空控制的齿轮换挡
同义词：
['vacuum-operated gear shift', 'vacuum-operated gear change']
例句：
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1. Thenew car has a vacuum-controlled gear shift that makes it easy to change gears.
这款新车配备了真空控制的换挡系统，使得换挡变得轻松。
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2.In the old days, people used to use a manual gear shift to control the speed of their vehicles.
在旧时代，人们使用手动换挡来控制车辆的速度。
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3. The engineer was able to adjust the vacuum-controlled gear shift to optimize the performance of the vehicle.
工程师能够调整真空控制的换挡，以优化车辆的性能。