随着新式球拍性能的加强和球手们对网球发球 技术的重视，业余选手也越来越多地面临应付 炮弹式发球的问题。那么应该怎么把这些疾如 炮弹的发球接回去呢？我们首先应该探讨一下产生炮弹 式发球的原因。 一个好的发球一定有这三个因素：节奏、放松和高 度的注意力集中。也就是 As the performance of new racquets strengthens and players attach importance to tennis serve, amateur players are also increasingly faced with the problem of cannonball service. So how should these diseases such as the pro serve back to go? We should first explore the causes of the cannonball service. A good serve must have three things: rhythm, relaxation and high concentration of attention. That is