??-???é????????é¥-?????·??°??????é???2??oo???è????????
??′??°?·±?¤???????é?¨??????è¢??oo??2??????
è°¢??????è??????·2???è???°????
a???????????è?????èˉ′????o?é?????a??
é?¨??£???é???o??????????
?°±??¨è°¢?????¥??o?ooèμ°?o??????????é?¨??′??????è¢??oo??¨?????¥???
è°¢?????|èo???±??????
è???2?è§???°?oo??????è????oé?????é|???3??????è¢?é£???|??°???é????????
??2?¤????èo??o±è£????è·1????????????è?¤é??é??èˉ±?oo????¥1??′?????ˉ??¨??????è§?è?£è??????|¥?????ˉ???é¤????è??????°??-¥??¢??¢èμ°??°???èo?è?1???
a???????¥??¥?????£?oo???èˉ′???????¤??2???????è¥?????¤??¤???¥é???-??-??2??o???????é??é??è???????ˉèo????è|??′§???è°¢????·2????2??o???aè°¢?¤a?¤a??????è????????????????aè°¢???????o????a??
?¥1???é?3?2????????μ?é????§è?2???é????|?????-è?????
è°¢????°±è????·???????¥1???
???????¥1è????¥??????????¥1??????é¤??????????é???¤′?????o????¢?é??è?3??1??????????¥1??????è?3???????°?èo???????è?a?·±èo????è′′???
??????????°±??3èμ·?o?è??????|?é?£????¤±???è?3???????????????
?????¥????¥1?????°??????é????ˉè???o??????ˉ??????
é????a????¤±??????é????a?????°?-?é????3???????|???????
???????|??|??????ˉ?????????è|?????o????a?|a?|
a???????¥??¥a?|a?|a??
a????????a??
è°¢??????é??????????????è|??¤±??§????????a???