?????????? ????? ?????? ??? ?????? ?????????????????????????????. ???????????? ???? ???? ???? ???? ???, ???? ???? ???? ???? ???? ???? ???? ???? ???? ??? ?????? ????????, ?? ??????, ?? ??, ?????? ?? ??????????????.If a grammatical principle that is definitely added to ????is often a vowel ??and there is no other selection apart from a vowel ??then t