??2?????????????????19?24?,?2671?

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????2??20?? ?20???????????,?????????2??????????????19??????24????,??????16.9?????,??????397?12?????????487?????,????2671????????????????????????????(?)3???,??64.7???

???????20?????????????????:2025?,????????????,??,???

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?????????,??????,???????????,??,???????????????,????????,?????????????????????“?”,?????,??“12+N”???,?????????????????????????,?,???,???????????“???”???????????????????????“???????????”?

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