扳机

Suddenly Guy, more by way of a nervous twitch than with malice aforethought, pulled the trigger.

盖伊突然动了机，但并非有意开枪，只是因为太紧张，抽搐了下。

The hunter cocked his rifle.

猎机准备射击。

He accidentally triggered his rifle.

无意中发了步枪的机。

As well as making the explosion more reliable, this allowed military engineers to turn the fougasse into a booby trap.

绊索由合股细线，头系在燧发装置的机上。