把方法搞错(或想偏);走错路线
牛津电影里 100%
to have the wrong idea about how to get or achieve sth
- Where is he? - You're barking up the wrong tree.
If I quit, I'd be agreeing with everyone who had ever told me I was barking up the wrong tree.
释义来自《牛津高阶英汉双解词典》第 9 版