自己租场地和穿球拍线？
包括将发球线前移靠近球网，强制使用拍面更小，力量更小的木质球拍。
These included moving the service line closer to the net and mandating the use of smaller and less-powerful wooden rackets.
每副球拍大约花费美元，只需把球拍交给林教练，强烈建议队员自备网球线。
Approximately USD per racket. Just pass your racket to Coach Lin. Players are highly recommended to bring their own string.
那么你的手，挥动什么来击打球？球拍？不，球拍不打球。手挥动…球线。好了，问题结束。
Your hand, then, swings what to hit the ball? The racket? No, that doesn't hit the ball. The hand swings... the strings. Okay, end of quiz.
什么击打球?快，马上回答。不是球拍， 而是拍面， 或者说球线。记住这点。
What hits the ball? Quickly, answer. It's not the racket, it's the racket's face, or strings. Keep this in mind.
瞬间钻孔：当给球拍打线孔时，碎片很容易落进拍框的中空的芯中。
Drill Flash: Debris that falls into the frame as a result of drilling the string holes.
什么击打球?快，马上回答。不是球拍，而是拍面，或者说球线。记住这点。
What hits the ball ? quickly, answer. it ' s not the racket, it ' s the racket ' s face, or strings. keep this in mind.
方法用小钢球拍验证片，并对所拍的影像分别进行线距的手工测量和数字X线机自带标尺测量。
Methods the steel balls were measured by slide caliper, then the computerized measurement was compared with manual measurement, and the reliability of computerized measurement was analyzed.
方法用小钢球拍验证片，并对所拍的影像分别进行线距的手工测量和数字X线机自带标尺测量。
Methods the steel balls were measured by slide caliper, then the computerized measurement was compared with manual measurement, and the reliability of computerized measurement was analyzed.
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