名词
中文翻译：Unknown
同义词：
['multispeed gearbox', 'variable-speed gearbox', 'multispeed transmission', 'variable-speed transmission例句：1. The car has a multiple-speed gearbox that allows you to select the right gear for different driving conditions.（这辆车有一个多速齿轮箱，可以让你根据不同的驾驶条件选择正确的档位。）']
例句：
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1. The car has a multiple-speed gearbox that allows you to select the right gear for different driving conditions.
这辆车有一个多速齿轮箱，可以让你根据不同的驾驶条件选择正确的档位。
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2. The new model of the car features a variable-speed gearbox that can automatically adjust the speed according to theroad condition.
这款新车配备了一个可变速齿轮箱，可以根据道路状况自动调整速度。
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3. The engineer tested the gearbox and found it had a smooth shifting mechanism with no noticeable noise.
工程师测试了齿轮箱，发现它有平滑的换挡机制，没有明显的噪音。