名词短语
中文翻译：换挡速度
同义词：
['shift gear', 'change gear例句：1. The car needs to change its gear for better acceleration.（这辆车需要换挡以获得更好的加速。）']
例句：
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1. The car needs to change its gear for better acceleration.
这辆车需要换挡以获得更好的加速。
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2.The driver must change his gear when the road is slippery.
当道路湿滑时，驾驶员必须换挡。
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3. The old car has a manual gear shift, which can be a hassle to change.
这辆旧车有一个手动换挡系统，换挡可能会很麻烦。