第7章（第3页）

èμ°è?????èˉ??????????????????¤???????·?????°±???è§????é?￠?????1é????ˉ?￡°é?3???

a???3?????????ˉ????-???¨???èo???o??·è????aèˉ′?3???????a??

a??????????￥èˉ′?????¨??·é????????é?′?????¨?????¨????¤?è???±??o?????§??-???-??????a?|a?|a??

a???????±?-?????????′?2??????????è????¤?????????é????ˉ??￥è°?è????o??????a??

?????¨?????a??????é?￠???????oo????????ˉ??2???????????ˉ?-??ˉ????è??????????1??????é???2???????

????·????????°??????°???é￠¤???

??°??¨???è?a?·±???è·?????????????????1???o?????￠???

a??????????????è??è?1???a??

è?????????????????????????????èμ·èo???￥??????????????????

????·????èμ°è?????????????????é????????è?1?????????é??è????￥???

a??????·2????°???¨é???o¤???èˉ??????′??????????????¨??¨?§?????1|????-???a?-???????????-????????o-???????°±??ˉ??￥?o????a??

????·???????èμ·????????????èˉ???????é?￡?o?a??????§???3?3???′è￡?a??????-????????????????????????????

??????è???????3èμ·è·?é??è??????????????????￥1?????????èμ·??¨?￥????é?￠?????￡èa????

a????????????ˉ1??1?????o?¤??|???????è?oè′???·???????-??????????é?????è???°????????????????a??

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

????·????????′§????????¨???????-?????¤???????èˉ??±????

a??????oo????·???????????3?????3?é?￠???èμ·èˉ?è?????èˉ·?±???¤??3??????é??è??????￥3?￡??|???????a??