?? ?????:????????
????:1????????:?????????????
2??????v
3?????????????
4????????
5?????????????
???12????4??? ?,?12????4???,??,???
????12?3????,???????? ? ??????????????????????,?????,“???????????,????”
?????,?????????????,“??”?
??,???????????12??????3????,???,????????????“?????????????”??4????4?????27??????????,????????????,??????????
??:???????????????