【释义】
bark up the wrong tree, [informal] to have a wrong idea, or do something in a way that will not give you the information or result you want
打错了主意; 认错了目标:
【例句】
The police spent three months barking up the wrong tree on the murder investigation.
警方调查这起凶杀案找错方向,枉费了三个月的精力。