[ eastern hemisphere ] 地球的东半部,通常从西经20°向东至东经160°的半个地球 [ serve a ball ] 开球 [ penalty kick ] 足球比赛中由于守方在球门区内犯规,由攻方在距球门中点12码处罚球,除攻方罚球队员和守方守门员外,其他队员都...
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Serve a ball being one of fundamental technology of tennis ball, the service technology is also the technology that unique factors such as route , placement , speed , trajectory not accepting to Fang Lai Qiu affects.
发球是网球基本技术之一,发球技术也是唯一不受对方来球的路线、落点、速度、轨迹等因素影响的技术。
参考来源 - 世界优秀女子网球运动员发球落点与技术相关表现研究·2,447,543篇论文数据,部分数据来源于NoteExpress
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