水泳
クロール
水泳選手
平泳ぎ
背泳ぎ
スイミング
バタフライ
スイミング 合成
Teenage girl doing butterfly stroke in swimming pool
Timing his strokes
Powering through the water
Portrait of mid adult man doing butterfly stroke in swimming pool, Cagliari, Sardinia, Italy
Teenage girl in swimming cap and goggles swimming in pool
Perfect butterfly stroke!