| 词汇 | be on a roll | 
| 释义 | be on a roll idiom  informal   连连获胜;好运连连 to be having a successful or lucky period  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。  | 
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