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一、抛球要稳。将球平稳地向上抛起不旋转。每次抛球的高度、距离都应基本固定。忽高、忽低、忽近、忽
First, to keep the ball steady. Pushing the ball up smoothly does not spin. The height of each throw, the distance should be basically fixed. Suddenly high, suddenly low, suddenly near, suddenly