flash mob

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释义
快闪
A group of people who rapidly assemble, perform an unusual and seemingly pointless act, and then quickly disperse.

例句
Max:Uh the Pokémon booth started a flash mob and they needed a Pikachu.(2 Broke Gilrs)
麦克斯：神奇宝贝那个展台有快闪活动。他们需要一个皮卡丘。（破产姐妹）