service ace的用法和樣例：
例句
- An ace is a service which cannot be reached by the opponent with his racket.
發球得分是指使對方用球拍擊不到球。 - Sampras brought cheers from the crowd at Seoul's Olympic Tennis Arena as he fired down two fierce aces in his first service game.
當桑布拉斯在首爾奧林匹克網球場上開始獲得兩個發球得分時，場上的觀眾報以熱烈的掌聲。
