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7?,???“?????????”??,?????(???????????????)???????????,?????“????????????”?

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???????,??,??5????????,?30????“???”???????,??????????20??????????????????50????60??,?????????????????,??????????“????????????”???????????

1977?????????????,????????,??“????????????”??????????????(???)???????,???????,?70%?

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??,???,????3?????????????????5?????????????,??;????????,8?????????????????????10???????????“??????????,???”

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