??? ??? ????? ???? ??? ??? ?? ???? ????? ?? ??, 23? ??? ????? ? ????????? ?? ??? ???? ??? ??(共同)??? 21? ??? ??? ???? ??, ???(北京)?? ????.
???? ??? ???? ?? ??? `?????'? `?????'? ????? ????. ??? ?? ???? ??? ????? ???? ?? ? ?????? ?? 2?? ? ????.
? ??? ???? ??? ??? ????? ???? ???? ??? ???? ?? ??? ???? ???? ??? ???? ?? ??? ??? ?????? ? ???? ??.
????? ?????? ?????? ???? ??? ??? ?? ??? ????? `?????'? ??? ???? ??? ??? ????.
??? ??? 1994? ????? ?? `???? ??? ?????? ?????' ??? ??? ?? ??? ??.
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