名词
中文翻译：仰泳
同义词：
['backstroke', 'breaststroke', 'freestyle']
例句：
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1. In the Olympicgames, athletes compete in various events, including the long-distance freestyle.
在奥运会上，运动员参加各种比赛，包括长距离自由泳。
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2. The swimmer's performance was outstanding, especially in the freestyle strokes.
这位游泳选手的表现非常出色，特别是在自由泳项目中。
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3.During the summer camp, the children learned to perform different types of swimming strokes, including the backstroke and freestyle.
在夏令营期间，孩子们学习了不同的游泳技巧，包括蛙泳和自由泳。