be on a roll 连连获胜，好运连连。= to be having a successful or lucky period
roll n.卷，滚动，名单，压路机，颤音，圆形物，面包卷。扩展表达有a toilet roll (= a roll of toilet paper) 一卷卫生纸，a deafening roll of thunder一阵震耳欲聋的雷声。
【例句】
Pippa won five games in a row and it was obvious she was on a roll.
皮帕一连赢了5场比赛，很明显她这段时间打得很顺。
June, you're really on a roll tonight.
琼，你今晚真是不知道倒了什么霉了。
【例句】
Pippa won five games in a row and it was obvious she was on a roll.
皮帕一连赢了5场比赛，很明显她这段时间打得很顺。
June, you're really on a roll tonight.
琼，你今晚真是不知道倒了什么霉了。
