What precisely triggered off yesterday's riot is still unclear.

具体是什么引发了昨天的暴乱仍然不清楚。

《柯林斯英汉双解大词典》

The mere mention of food had triggered off hunger pangs.

单单提到食物就引起了阵阵的饥饿感。

《柯林斯英汉双解大词典》

It is still not clear what events triggered off the demonstrations.

还不清楚是什么事件引发了示威。

《柯林斯英汉双解大词典》

An earthquake off Java in 2006 triggered a tsunami that killed about 600 people on the island's southern coast.

VOA: standard.2009.09.03

The events of May 6 triggered an investigation as to whether the feverish sell-off stemmed from a computer glitch or market manipulation.

VOA: standard.2010.05.20

India's highest court ordered a count of the temple's wealth - and this has triggered off a tsunami of wild speculation.

BBC: The feisty Indian kings and their temple treasure

That's the word from the Department of Agriculture a day after news about infected British beef triggered off an international scare.

CNN: USDA: American burgers still safe

Friday's sell-off was triggered by US inflation data, which posted its biggest jump in five years.

BBC: US stocks recoup losses