?? ??????? ????? ????? ???? ????? ?????? ???? ????? ???? ???. ??????? ???? ???????? ? ????? ?? ?????? ?? ??? ????? ?? ??? ?????/fluctuation|?? ??? ????? ???. ??? ??????? ????? ????? ???? ??? ??? ? ??? ???? ? ?????| ?????????? ????? ???? ???? ??????/????? ??? . ???> ????? ??????? ????? ???? ??