要注意步法、挥拍的角度和击球动作的平稳。
Attention to footwork Angle of the racket smoothness of strokes.
从生物力学的角度，对网球正手击球的动作效果进行分析与评价。
From the Angle of Biomechanics, this paper makes analysis on action effect of forehand shot in tennis.
根据乒乓球运动中击球时用力方向、拍面角度、发力大小、旋转性能等方面阐述对球的飞行弧线的影响。
The paper discusses the influence of the direction and strength of force, the angles of the bat and spinning on the balls flying curve.
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