当你练球的时候,每一次都应该做在一样的预备发球动作,就象每一次比赛之前所做的那样。
When you're practicing your serve, go through the same pre-serve rituals you use during a match.
新、旧发球技术在用力节奏上有本质性区别,新的发球动作节奏更符合动作目的和人体运动原理。
There exists intrinsic difference between the old and the new serves in that the new serve is true of the aim of actions and the laws of human movement.
研究发现,网球运动员的发球动作速度、正反手击球动作速度与专项速度素质之间有着密切的相关性,专项速度素质之间也有显著的相关性。
In order to improve the hitting speed of tennis athletes, the authors used the method of sports measure and statistics to analyze special speed quality of 28 young elite tennis athletes.
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