a swimming stroke that resembles the crawl except the swimmer lies on his or her back
动词 backstroke:
swim on one's back
backstroke例句
He can swim breaststroke, backstroke and crawl.
他会游蛙泳、仰泳和自由泳。
backstroke详细解释
back.stroke n.（名词）Sports A swimming stroke executed with the swimmer lying on his or her back.【体育运动】 仰泳：游泳者用仰卧姿势进行的泳姿A backhanded stroke or motion:反手击：反手击或运动：例句：a saw that cuts on the backstroke.一把反手切割的锯 【引伸】 back.stroke. v.（动词）back.stroke.er n.（名词）
