1. Due to a police mix-up, the robber went free and the victim was jailed.
    由于警察搞混了，小偷逃逸而受害者却入狱了。

1. （计划上的）失误，差错，失败
    A mix-up is a mistake or a failure in the way that something has been planned.

    e.g. I''m sure it was just some sort of mix-up.
           我相信这只不过是一次失误。
    e.g. ...a mix-up over travel arrangements.
           旅行安排上的差错

1. a mistake that results from taking one thing to be another

    e.g. he changed his name in order to avoid confusion with the notorious outlaw

    Synonym: confusion