He umpired baseball games.
他担任棒球比赛的裁判。
柯林斯例句
He umpired in the tennis match.
他在网球比赛中担任裁判.
《现代英汉综合大词典》
He umpired for school football matches until he was in his late 50s.
他担任校际足球比赛的裁判一直到年近花甲。
辞典例句
I've umpired a cricket match for them.
我当过他们的板球比赛的裁判.
《简明英汉词典》