trigger

/ˈtrɪɡ.ɚ/

名词

（枪的）扳机
It's not clear who actually pulled the trigger.
不清楚究竟是谁扣动的扳机。
（引起某种坏事的）一件事（或情况）
There are fears that the incident may be a trigger for more violence in the capital.
有人担心，这次事件可能在首都引发进一步的暴力活动。