不是的,手臂手腕是身體下壓後的動作.應該先前跳. 發球,擊球手臂手腕總是不帶動身體. 相反!

來源: oldpp 於 2014-09-03 10:48:14 [舊帖] [給我悄悄話] 本文已被閱讀：次

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