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“????,???????????!”???,???????????????????????????????,?????????????????,????,??????????,???????????????,???????????????????

???,????????????????????1979?????????,?????????????70????????,??800??????????

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

???????????????????????????? ?

????,???????????????“????”???????????????,?????????,??????????????????,??????“??????????????????????,??????‘??’,??”

?????????“??”???????1999??????????????????,??,???????????,???????

???????????????,???“????”???????????,??????????,?????????????????????????????????,“??”,????8-10????????????????4-6????????

2004????,????????????????????????????,2007????,???????????????,?,??????????????????“??????”?????,??34?,???

“????,??????????,??5%-10%?,???????50%-60%?”????“??????????”??????

??????????????DNA???,??????????????????? ?????

1984????????????,????????????,???30????,??????????????????80?????2000???????????????

?????????????????????????????,?????????????,?4?,?????????????????2.5-3???,??,??

???10?????????????????????,???????????????????????????“?”??????????????“???????????????????,??????????????????‘?????????’?????”??????????????????????????

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