Brooklyn Nine-Nine · Season 1
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on a roll

运气很好 / 进展顺利

「on a roll」指一个人或一件事正处于非常顺利、运气很好的状态。这里 Jake 说 Hitchcock 突然「on a roll」, 意思是 Hitchcock 突然很走运,案子一个个破。

Give all my open cases to Hitchcock,
who's suddenly on a roll, and assign me 20 fresh ones.
Eventually, my luck will turn.
on a roll — Brooklyn Nine-Nine S01E03 · ReelWord