第8章（第5页）

?????????????????????????????|¨?￠??′???????????1??|???????

???????è??????????????????1?é?′????§??§??o?è???1???°?-¤??o?-￠??????

?????￥???¨??????????????￥??????????￥3???????????????????23?′??°?????o???????è￡′?-?è???°???????é?￠??????????????￥?￥??????????

?????ˉ?????￡?1?è????·???è????o???????o￠?o?é??é??????ˉ???????

é???￡???′???a????????a????????????-??????3?°???￥??′???

?′??·?é?3???é?μ?¤′????????????è§??o?é??????¨??3????

???è?????è·3??¨è????￥è??è????????è??è??é?????????????′é??????????§?1???????????1?è|??°??￥1?1???-???

?￥1???????????￡?°????????-￥???è??è????a??°é???￡oè?1??????èoo?o?è????????

????????-?°?é??????????oé?′????￥1??????????§?????????????è§????

a????????a??a??a??

????￡°???é??????°′?￡°è?????????-??????°???

?′??·?é?3??1?????′è§????è?????????°?????????????????°????????§???¨?￡o???????°??￡o???????o??????????

???a??a?????a??a??

???è·3?￡°?????￠????-????

?′??·?é?3?????¨?￡o???è?1??????????????????è?????é?-????o??????????

è￡′?-?è????????è§??o????

????1????�a?|a?|

a????-???a??

???é?¨è￠??oo????¤???¨?????????èo????è￠????è￡′?-?è??èμ°?o?è????￥???

a??é?3é?3???????????￥?o????a??