breaststroke knee

例句：

1. 1. The swimmer performed a beautiful breaststroke in the pool.
   这位游泳者在泳池中表演了一次优美的泳姿。
2. 2. The swimmer won the gold medal in the breaststroke event at the Olympics.
   这位游泳者在奥运会的泳姿项目中赢得了金牌。
3. 3. The swimmer's breaststroke was so fast that it left her competitors in the dust.
   这位游泳者的泳姿如此之快，以至于她的对手都跟不上她。