名词
中文翻译：自动换档
同义词：
['automatic gear change', 'automatic transmission', 'autoshift', 'self-shift', 'automatic shift']
例句：
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1. The car has an automatic gear change that makes driving smoother.
这辆车有自动换档功能，让驾驶更顺畅。
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2. The truck had a manual transmission, which required the driver to shift gears manually.
那辆卡车是手动变速器的，需要司机手动换挡。
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3. The new car comes with an automatic shift system that automatically changes gears based on driving conditions.
这款新车配备了自动换档系统，根据驾驶条件自动换挡。