Police cordoned off the area until the bomb was made safe.

警方封锁了这个地区直到炸弹被安全拆除为止。

《牛津词典》

In a battle, a bomb went off just behind him but he survived.

一场战斗中，一颗炮弹就在他身后爆炸而他幸存下来了。

youdao

Computer viruses act like biologics in the way they can be set off: they can be virulent from the outset of the infection or they can be activated by a specific event (logic bomb).

计算机病毒的传播行为与生物病毒极其相似：它们可能从开始感染时就是致命的，可以被某些特定的事件所引发(逻辑炸弹)。

youdao

Iraqi police said that a bomb, hidden near the front gate of the Rasheed market in the Dora district of Baghdad, went off as trucks loaded with fruits and vegetables were waiting to enter the market to unload.

VOA: standard.2009.06.01

Coletti told CNN that a female student overheard the boys talking about the alleged plot to set off a bomb at McKinley's graduation ceremony on June 28.

CNN: 5 middle school students charged with conspiracy to blow up Brooklyn school

The added security measures were implemented after 23-year-old Umar Farouk AbdulMutallab tried to set off a bomb aboard a Northwest Airlines flight from Amsterdam, Netherlands, to Detroit, Michigan, on Christmas.

CNN: TSA extends expanded airline security

The added security measures were implemented after Umar Farouk AbdulMutallab, 23, allegedly tried to set off a bomb aboard a Northwest Airlines flight from Amsterdam, Netherlands, to Detroit, Michigan, on December 25.

CNN: TSA maintains high security at airports