gun trigger

• 枪支上用手指按压以发射子弹的部件；也比喻引发某个过程或事件的动作或机制。

The part of a firearm that is pressed to fire the weapon; also used metaphorically to refer to the action or mechanism that initiates a process or event.

1. Mechanical part of a firearmB1formal

   A small lever or button on a gun that is pulled to fire the weapon.

   枪扳机

   • He placed his finger on the gun trigger.
   • The safety lock prevents the gun trigger from being pulled accidentally.
   • She pulled the gun trigger and the shot rang out.

2. Figurative: cause or catalystB2informal

   Something that initiates or sets off a reaction, event, or process.

   导火索（比喻义）

   • The news acted as a gun trigger for widespread protests.
   • His comment was the gun trigger that started the argument.
   • The economic crisis was the gun trigger for major policy changes.