The team has been on a roll [=has been playing well and winning many games] since midseason.从赛季中期开始，这个队就连交好运，赢了多场比赛。

He's a funny guy, and last night he was really on a roll. [=he was saying many funny things]他是个有趣的人，昨晚他讲了很多有趣的事。