名词
中文翻译：维持踏板
同义词：
['supporting pedal', 'sustaining pedal']
例句：
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1.The bicycle has a sustaining pedal that allows the rider to maintain their balance while pedaling.
这辆自行车有一个支持踏板，允许骑手在踩踏时保持平衡。
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2. During the race, the runners used sustaining pedals to help them maintain their speed and stamina.
在比赛中，跑者使用支持踏板来帮助他们维持速度和耐力。
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3.The engineer designed a sustaining pedal system that could provide power for long-distance cycling.
工程师设计了一个支持踏板系统，可以为长途骑行提供动力。