mix someone/something up
phrasal verb with mix verb uk/mɪks/ us/mɪks/
B2 混淆;把…弄混
to fail to recognize two people or things correctly by thinking that one person or thing is the other person or thing
People often mix us up because we look so similar. 人们常把我们弄混,因为我们看上去很像。
I think you're mixing me up with my sister. 我想你把我和我姐姐弄混了。