He was priming the bomb to go off in an hour's time.

他在事先准备炸弹在一小时后爆炸。

《柯林斯英汉双解大词典》

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》

The bomb went off in a crowded street.

炸弹在挤满人的大街上爆炸了。

《牛津词典》

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

Umar Farouk Abdulmutallab had tried to set off the bomb minutes before the Amsterdam-to-Detroit flight landed.

NPR: Lawmaker: FBI Checking Training Angle In Bombing

Just past noon on Sept. 16, 1920, anarchists set off a bomb on Wall Street, killing 38 people.

WSJ: Crovitz: In Praise of Surveillance Cameras

According to authorities, he intended to set off a bomb in a Chinese restaurant popular with Fort Hood soldiers and their families.

BBC: Awol US soldier Naser Jason Abdo jailed for life