???????????????????2????????21???? (??????????????????? ??)?,??,???????????????21????????????????????,???????????,???,??????,??“???????????????”???,????????????

??????“???????????”?????????????????????,????????????(?????????????????????)

?2???????????H???????,????“???????????????????”??????????????????“?”????????????,?????????????????????,??????????????????????????,?????????“????????????????”?????,??????????

??????,???????????,????????????“??????”??????????,??????????????????????????????,?????????????????1????????????????,??360°??????????????????,????,?????????,???????????????

??????,“??????????”????????????,?????????????,?????????????????,????(????????)

????:???

??

??:???????????,??????????,??????????????