首頁›Browse›U›unreturnable serveunreturnable serve編輯正在努力提供更完整的內容，建議 20 分鐘後再回來看看unreturnable serveunreturnable serve — 名詞名詞1. A serve in tennis that the opponent cannot return1.名詞釋義無法回擊的發球A serve in tennis that the opponent cannot return例句He won the point with an unreturnable serve.