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41.能举例说明吗?答:比如蛙泳:动作结构:（1）俯卧水中;（2）两臂和两腿向两侧做对称的划水和蹬
41. Can you illustrate? A: Such as breaststroke: Action structure: (1) prone prone water; (2) arms and legs to both sides of the symmetrical paddling and pedaling