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??k? ???? ???? ??? û ???µ? ?? ??? i??? 4.3 ?
???? ????L? ??? ???? ?? 4.4
?? ???? ??;?? ???w ???? 4.5
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1h???????? 2?l 3??????? 4??l??? ??ÿ?i??????????k???k? 1???
b?
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5.2
[ri , li, xiyi] ?ri??li ?????xi ???yi ?? h???ü????????????????k???????½????h???????h??????L??????h??j??gÿhj???????????????2 ? ?'???h??£h?????²?? 1???? 2?ÿ[ri , li, xiyi]ÿ???L? 3h???? 4??????
5.3 ?J?
?J????o????????????20¡?????,??21?31????21???k???h??1?? ?J??????????????????h???'3±???ÿ?d????????h??? 5.4 ??
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??J???????????25????12.813.2?????? 6 ?
1???? 2???? 3??? 4? 7 ???
7.1 ????
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8
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