[問題] 關於發球球速
請問一下?
若發球球速相同,球落地後在哪個場地會飛最快? 是草地嗎?
還有
若是切球,假設情況相同,非最低的在哪種場地? 是草地嗎?
已爬過文 不過不太確定以上的推論
所以希望有經驗的人可以分享一下
謝謝!
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