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众所周知,网球场上的进攻与防守战略战术是多么的关键:一来可以用最优化简洁的网球套路击败对手;二来可以在最大程度上节省自己的体力。
As we all know, tennis and offensive and defensive strategy and tactics is how crucial: one can use the most simple and elegant tennis routine beat opponents; secondly, to maximize their physical strength.