名词
中文翻译：三档齿轮
同义词：
['three-speed gear', 'triple gearbox']
例句：
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1.The car has a triple gear that allows for easy acceleration.
这辆车有一个三档的变速箱，可以轻松加速。
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2. The engineers have installed a triple gear in the transmission to improve efficiency.
工程师们已经在传动系统中安装了三档齿轮以提高效率。
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3. The trip was made more comfortable with the addition of a triple gear.
增加了三档齿轮后，这次旅行变得更加舒适。