Brooklyn Nine-Nine · 第 1 季
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hit a wall

碰壁;遇到障礙

字面意思是「撞到牆上」,引申為在某個任務、專案或進展中遇到了無法克服的困難或障礙,卡住了,無法繼續前進。這裡指調查線索斷了。

None of the partials returned any matches.
Nobody in your building saw anything. We've hit a wall.
So what do we do next?