名词
中文翻译：回弹动作
同义词：
['backstroke', 'backstroke stroke']
例句：
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1.The swimmer executed a flyback stroke to propel himself forward.
游泳者执行了一个回弹动作来推动自己前进。
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2.During the race, the runner used his backstroke stroke to maintain his speed.
在比赛中，跑者使用他的回弹冲量来保持他的速度。
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3. The gymnast performed a backstroke stroke to demonstrate her strength and flexibility.
体操运动员执行了一个回弹动作来展示她的力气和灵活性。