名词中文翻译
中文翻译：可变速箱
同义词：
['variable-speed transmission', 'variable-speed gearbox']
例句：
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1. This car has a variable speed box that allows you to adjust the engine's RPMs for different driving conditions.
这辆车有一个可变速箱，可以让你根据不同的驾驶条件调整引擎的转速。
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2. The engineer installed a variable speed box in the transmission to improve fuel efficiency.
工程师在变速器中安装了可变速箱，以提高燃油效率。
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3. The driver can use the variable speed box to switch between low and high gears quickly and easily.
驾驶员可以使用可变速箱快速且容易地在低速和高速之间切换。