??? ?????? ???? ???? ???? ????? ??? ?????? ????, ???? ???? ????? ?? ?????? ??? ???? ????? ????? ???? ????? ?????? ???? ????. ???? relaxation} ???? ??? ???? ?????? ??????. ??? ??, ????? ?????. ??? ??? ???? ??????. ???????: ??? ??? ??? ???? ??????. ???????? ????, ???? ??????. ??????? ??? ????? ?????? ???? ???? ?????? ????? ?? ???. ?? ??? ????