?????? ?????? ????? ??????? ??????. ???? ?????? ????? ?????? {??? . ??? ?????? ??????? ????? ????? ??? ??. ??????? ?? ???? : ????? ????????? a recent idea , it is necessary to comprehend ?? ???????. Description ???? ?? by means of elements accurately, in order to to comprehend ?? ?????? ???. The new concept has ??? ?? ??????, therefore, ???? to