trigger-happy

The trigger-happy hunter shot at the rustling bushes before he could see the animal.

那个乱开枪的猎人还没看清动物就朝沙沙响的灌木丛开了枪。

用法提示：trigger-happy作定语修饰hunter，表示未辨明目标就开枪的倾向。

The new guard is so trigger-happy that he once fired at his own shadow.

新来的保安太爱乱开枪，有一次竟对着自己的影子开了枪。

用法提示：trigger-happy作表语，与so...that连用，强调乱开枪到了极端程度。

The range officer told the trigger-happy shooter to wait for a clear view.

靶场负责人让那个乱开枪的射手等看清目标再开枪。

用法提示：trigger-happy作定语修饰shooter，说明其行为鲁莽，未伺机看清目标。