什么时候该为你的球拍重新穿线?当然不是等到球线被打断了的时候。职业选手每打一场比赛就要更换一次球线,但大部分业余选手都不会、也没有必要这样做。业余选手通常还是跟着感觉走,感觉手感不太对了,就去重新穿线。可是,感觉往往是不精准的。那该怎么办?现在,有一款苹果手机的APP(应用程序),就能够很好的帮你解决这个问题。现如今苹果手机大行其道,可以说是史上最昂贵的街机,与之对应的是苹果在线商店里面五花八门的应用程序, When should it be re-threaded for your racket? Of course not when the ball is interrupted. Professional players need to change the ball line for every game they play, but most amateurs do not and do not have to. Amateur usually follow the feeling go, feel not feel right, go to re-threading. However, the feeling is often not accurate. What to do? Now, there is an Apple phone app (application), we can help you solve this problem. Apple’s mobile phone is now popular, it can be said that the history of the most expensive arcade, which corresponds to Apple’s online store which has a wide variety of applications,