讲解文本：
on a roll 做得很顺，顺风顺水，走好运 Our team is on a roll. We have won most of our games. 我们队现在顺风顺水，大部分比赛都赢了。 Her business is really on a roll recently. 她最近的业务做得顺风顺水。
疯狂练习吧！
