cross purposes
noun/ˌkrɒs ˈpɜːpəsɪz/
/ˌkrɔːs ˈpɜːrpəsɪz/
[plural]- if two people are at cross purposes, they do not understand each other because they are talking about or aiming at different things, without realizing it
（因彼此谈论不同事情而未意识到的）相互不理解，相互误解 - I think we're talking at cross purposes; that's not what I meant at all.
我想我们是说到两下里去了，我根本不是那个意思。
- I think we're talking at cross purposes; that's not what I meant at all.