University and ivory tower:entity and idea

There are many realistic and sensible problems between the word and the word on the relations of its linguistic symbol and real meaning.Such as why university is called ivory tower and what is the implication and significance of ivory tower.However there are historical relations between university and ivory tower.An ivory tower is a symbolization of the universities spirits.At present,ivory towers suffer some realistic crises and the confused cognitions caused partly by different schools; they are school of reconstruction and school of going-out.In fact,there are no necessary conflicts between constructing an ivory tower and opening to the outside.A university should get more prosperity outside through building itself inside.