名词
中文翻译：Unknown
同义词：
['shift gear', 'change gears', 'shift the gears']
例句：
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1. Thecar needs to be shifted into higher gear before taking off.
在起飞前，这辆车需要被换到更高的档位。
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2.The driver had to shift the gears quickly to avoid a collision.
司机不得不迅速换挡以避免碰撞。
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3. The old car has a lot of gears that need to be shifted carefully.
这辆旧车有很多档位，需要小心地换挡。