In the backstroke the swimmer must stay on his or her back, except during the turns.
游泳者在游仰泳的过程中除了转身之外，男女运动员必须呈背式。
They used artificial respiration to bring the swimmer back to life.
他们用人工呼吸使游泳者苏醒过来。
Yes. In medley relays, each swimmer swims one stroke for the set distance; the order is back-stroke, breast-stroke, butterfly and freestyle.
是的，在混合泳接力赛中，每位运动员以一种姿势游一定距离，顺序依次是斧正游泳、蛙泳、蝶泳和自由泳。
When water drops over a obstacle, it curls back on itself, forming a strong upstream current which may be capable of holding a boat or swimmer.
当水跌过障碍物，它会自己回卷，形成一股强劲的可以困住船或者游泳者的回流。
When water drops over a obstacle, it curls back on itself, forming a strong upstream current which may be capable of holding a boat or swimmer.
当水跌过障碍物，它会自己回卷，形成一股强劲的可以困住船或者游泳者的回流。
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