two games instead of one (especially in baseball when the same two teams play two games on the same day)
同义词：twin bill, doubleheader, double feature
double-header详细解释
double-header 也作 dou.ble.head.er n.（名词）Sports Two games or events held in succession on the same program, especially in baseball.【体育运动】 连续两场：同一项目的连续两场比赛或两个项目，尤其用于棒球A train pulled by two locomotives.双头式列车：用两个机车牵引的火车
