???????“city?????city”?:??

????:?????????:??????

????????7???????????????????4?????????????(? ??? ?????????????????????)?????“city?city?????????”“???????????city?”??????,?????????????????4???????,?,????

????,?“city???????????????city??”“??????city?????????????????????”??????????,?????????

“?????,???”??

?,??????????????,??????????????5???,????????????1200?,?700??????;?????????????,????????????57%?

“???????,???????????,??!”???????????(???) ??:????????