double header
双重任务或双重比赛，即在同一天或同一场合举行的两个活动或比赛。
口语·体育或活动连续进行
英文释义
two games or events played one after the other on the same day, typically in sports
例句
The baseball team has a double header tomorrow, so they'll play two games back to back.
典故来源
源自19世纪铁路术语，指两节火车头连接牵引，后用于体育赛事中连续两场比赛。