inside-out是网球专业文章和解说中经常出现的专用词汇。如同Ace,winner一样没有对应译名而最好直接使用原文。专指在场内打出有效斜线球穿越对方场地边线飞出。 Inside-out is a special vocabulary that often appears in professional tennis articles and narration. As Ace, winner, there is no corresponding translation and it is better to use the original text directly. Specifically refers to the use of effective slash balls in the court to cross the sidelines of the opponent’s court.