There is no specific mapping between A and B.请问大家,这里的mapping怎么解释?

There is no specific mapping between A and B.请问大家,这里的mapping怎么解释? there is no point No longer is there There is no way. there is no way there is no There Is No There is no there is no silver there is no wait there is no evidence If there is no there is no 和 there is not Where there is no trust there is no love . Because there is no because,so there is no so. There is no dream ,no tomorrow there is no one at where there is no water ,there is no life_____ is no water ,there is no lifewhy use where there?