名词
中文翻译：自动变速器同义词
同义词：
['self-changing gearbox', 'automatic transmission', 'self-shifting gearbox']
例句：
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1. The car has an auto-changer that allows you to switch gears without manually shifting the clutch.
这辆车有一个自动变速器，可以让你在不手动换挡的情况下切换档位。
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2. The engineer replaced the old auto-changer with a new one to improve efficiency.
工程师用一个新的来替换旧的，以提高效率。
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3. The new model has an auto-changer that can automatically shift between low and high gears based on driving conditions.
新款模型有一个可以根据驾驶条件自动在低速和高速档之间切换的自动变速器。