???? ???? ????? ?? ?? ????? ????? ????? ???????? ????? ?????? ????? ???????? ?? ???? ?????? ?????? ???. ?? ??????? ?? equipments ???? ? ???? qualified? learners ????????? basic ????????? ??? ????? ?? ?? ????? ??? ??????. ??? ?????? ???? ???? ??????? ???? ?? ???? ????? ????????? ????? ? ???? valuable ??? ?? ?? ??? ?? ???? ??????? ??? ????? ???. ???