Some of them are a little trigger-happy—they'll shoot at anything that moves.
他们中的一些人有点爱动用武器—他们会向任何移动的物体射击。
《柯林斯英汉双解大词典》
2
The problem is that trigger-happy intervention also has its drawbacks. It has long been accepted that retail depositors should be protected, to maintain their faith in the financial system.