??, ???? ???? ?? “????? ??? ?? ?????? ?????? ?”? ?????? ?? ??????. ??·?? ???????? ?? ?????????????????, ??? ??, ?????? ?? ??, ?? ???????? ?? ??, ?? ?????? ?? ?? ????????????.If a grammatical theory that is definitely included to ????is often a vowel ??and there is no other choice other than a vowel ??then that grammatical principle can not