Analyze the racket grasp style, footwork, and the course of lead and brandish of the two baseline drives respectively, and compare the techniques and bio-mechanical characteristics between.
分析两种不同网球底线击球技术的握拍法、步法和引拍挥拍的运动轨迹，比较它们的技术特点及其生物力学特征。
Analyze the racket grasp style, footwork, and the course of lead and brandish of the two baseline drives respectively, and compare the techniques and bio-mechanical characteristics between.
分析两种不同网球底线击球技术的握拍法、步法和引拍挥拍的运动轨迹，比较它们的技术特点及其生物力学特征。
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