A flash mob is a group of people who come together suddenly in a public place, do something unusual for a short period of time, and then quickly break up.

快闪族，是指一群人突然在公共场所聚集，在短时间内做一些不寻常的事情，然后迅速散开。

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Youth activists, meanwhile, organised a flash mob in a House office building today.

与此同时，年轻的积极分子们今天在众议院的一幢办公楼内组织了一次快闪行动。

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A flash mob is a large group of people who assemble suddenly in a public place, perform an unusual action for a brief time, then quickly disperse.

一群互不相识的人，透过因特网相约在指定时间和地点集合，然后一起做出一些无意义的动作，例如拍手掌、叫口号等。

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Kogi ("meat" in Korean) publicised guerrilla appearances of its fashionably designed truck via Twitter and attracted a flash mob following.

BBC: The LA food truck revival

The Environment Agency has staged a flash mob in Bristol in an attempt to get more people to sign up to its flood warning service.

BBC: Bristol flash mob aims to increase flood alert users

Going forward, Disney will bring together the Haunted Mansion with all nearby attractions and activities to create a universal experience, similar to a flash mob performance.

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