"Bullet-triggered" 或 "caused by a bullet" 可以用来描述子弹引发的事件或结果。
"Triggered" 这个词是由动词 "trigger" 派生而来，"trigger" 的意思是引发、导致、使发生。因此，"bullet-triggered" 就是指由子弹引发的事件或结果。
"Caused by a bullet" 则是指由子弹所导致的事件或结果。
例句：
The explosion was bullet-triggered. (爆炸是由子弹引发的。)
The victim died from a bullet-triggered wound. (受害者死于子弹引发的伤口。)
The fire was caused by a bullet that ricocheted off a metal surface. (火灾是由一颗子弹从金属表面反弹引起的。)