“卖国贼”的英语可以翻译为：traitor，quisling ...

“卖国贼”的反义词：爱国者。...

那个卖国贼终于被人发现并被监禁了起来.The traitor was finally found out and put in prison.他被描绘成卖国贼.He was depicted as a traitor.最近有本关于卖国贼的新书。You know, there's a new biography of quisling....