to drop the subject 打断话题
英文释义
To cease discussion of a particular topic, usually because it is unpleasant.
例句
My friend got so angry when I started talking about the job he lost last month that I knew I should drop the subject immediately.
当我开始谈到我的朋友上月丢掉的工作时,我的朋友变得特别生气,我明白,我得赶紧打住。