" To talk down to (someone)" means to talk as if you thought that person was less important than you, was in a lower position, or perhaps was less intelligent than you are.

" To talk up to (someone)" 意思是说话时好像你认为那个人不如你重要，地位较低，或者可能不如你聪明。

When someone is talking down to someone else, the person talking is treating the other person as if they were lower than them, less important than them, or, again, not quite as smart as them.

当某人对别人说话时，说话的人对待对方的态度就好像他们比他们低， 不如他们重要， 或者再说一遍， 不如他们聪明。