trigger

1. N-COUNT The trigger of a gun is a small lever which you pull to fire it. 扳機

A man pointed a gun at them and pulled the trigger. 一個男人用槍指著他們，扣動了扳機。

2. N-COUNT The trigger of a bomb is the device which causes it to explode. (炸彈的) 引爆裝置

...trigger devices for nuclear weapons. …核武器的引爆裝置。

3. V-T To trigger a bomb or system means to cause it to work. 引爆; 觸發(fā)

The thieves must have deliberately triggered the alarm and hidden inside the house. 那些小偷一定是故意觸發(fā)了報警器，然后藏在屋子里。

4. V-T If something triggers an event or situation, it causes it to begin to happen or exist. 引起

...the incident which triggered the outbreak of the First World War. …引起第一次世界大戰(zhàn)爆發(fā)的事件。

5. PHRASAL VERB Trigger off means the same as . 引起

It is still not clear what events triggered off the demonstrations. 還不清楚是什么事件引發(fā)了示威。

6. N-COUNT If something acts as a trigger for another thing such as an illness, event, or situation, the first thing causes the second thing to begin to happen or exist. 引發(fā)…的原因

Stress may act as a trigger for these illnesses. 壓力也許是引發(fā)這些疾病的一個原因。