to rub off or remove information from a piece of writing删去;抹去;勾销
His name has been expunged from the list of members.他的名字被从成员名单中删除了。
to cause something to be forgotten使淡忘;(从记忆中)抹掉
She has been unable to expunge the details of the accident from her memory.那次事故的细节总是萦绕在她记忆中,怎样都无法抹去。