on a roll片语KK [ɑn ə rol] /ɑn ə ɹoʊl/发音片语1连连得手、顺风顺水、手气正旺口语The team is on a roll, having won six games straight.这支队伍正连连得手,已经六连胜了。2兴头上、越讲越起劲口语Don't interrupt him now; he's on a roll.现在别打断他,他正讲得起劲。用这个字练口说→