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入门难、晋级难,这几乎是所有业余网球爱好者的共有困惑——为了帮助球友们突破瓶颈,“Tennis123网球数学法”应运而生。
Difficult to get started, cut hard, which is almost all amateur tennis enthusiasts shared confusion - in order to help golfers break the bottleneck, “Tennis123 tennis mathematical law ” came into being.