1.up to date:最近的,最新的;现代的;适时的。up to date 作定语修饰名词时需要用连字符“-”连接。注意下面第三个例句。动词 update 是从up to date 转化而来的。如:The president insisted that the company bring itsaging equipment up to date.This catalog is not up date.It was publishedseveral years ago.The news program gave an up-to-date account ofthe nuclear accident.The newscaster said that he wouldupdate the news report every half hour.2.out of date:过时的.废弃的(不再出版);非