?????9?19?? (?? ???)??????????????????????????“??”(Sigma Geography),9?19????????????????????????????????,“??”?????????????????,??“??????”,?????????????????? ????? ???????????????(?????)??????????????,“??”????????????????????????????????????,????????????????????????????????????????????,?“??”??“???”“???”“???”“???”???,????????????????????????????????????????????????? “??”?????????????????????????????????,“???”??,????????4???16???????????,??320????????????,????4???????????????????????????,“??”?????????????????????,?????????????????31.3%? “???”??,?????????????????????????????????????????,??“??”?????????????,??????????????????,?????????????????????????? “???”??,??????“????—????—????”????????????????,??“??”???????????????????????????????????????????,????????????????????????????? “???”??,??“??”???????,???????????????????????????????,???????????????? ????? “??”???????????????????????,???????“??”??????????????????????????????????????,?????????“??”??????,??????????,????????????,?????????????????????,?????????????? ????????????????????,?????????????“??”,???????????????????????,??????????????????,?????????????????,??????????,???????????? ????????????????????,“??”???????????????????????,?????????????????,??????????????????????????????????????,????????????,?????????????????????? ??????????,“??”???????????????????,????????????????????????????????????????????????,?????????????????????,??????????????? ????????????,“??”???????????????????????????????????????????????????,“??”???????????????????????? ????? ??????????????????????????“??”???????,??“??”?“?”???;“?”???,??“???”,??,“??”?????????????,?????,??????????? “??”????????????????,??????????,????????,??????????????????????,“??”???????«??»???«??»«?????»?????????????????10??? ?????,???,“??”????????????????????,????????????????;????????????,??????????????????????????,??????????????????????????????? ???,??????????????????????????????????????“???”,?????“??”????????,???????????????????????,??????????????????????,??????????????“????”????“????”“???????”????(?)