????31????????????

??2?????????14????????????????????????? (?????????????????????????????? ?????)????????????????????????????????14???????,?????????8.5??,?????????39.2%,???1993?????????????????????????????,??,????????,????,???????

???????????????,?????????????,???“???,?????‘????’??????????????????????????????????????????‘???????????’?,?????????????????????????50%,??????,???????????????????”??

???????????????????????????????????,????????????????????????,???,???,????????80???????????????????

???????????12????????????????????????????,?????????,??

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