Լְڣȷʵûа취ƩƨnƩwzww.ҲûжԼİʲôԹԣûһ˿֮ǰһǸмԼԼԼġնôģݾƴҲԸôںдš֪ٺũս£УǶöûʲôԼҲȥ
ݾ¶ǰ֪ĻôЩģǾDzܲ˵ûдУȷʵԴ̬ȣDzܲǡɾ֪ˣҲΣ֪֮еģԼȷʵܲǡ
ֽδĵͦ죬dzεϡϾΪݾҲûǿֽȷʵǷһѵ˵ʲô̼Ȼο϶ôΪϾҪĻܲٻȷʵDz֪
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ܲѾѴȨʱĺԨںũѾôˡ˵ֽȻԼİţû̫ûɶԼǽԼȴҪܵĺԨĹƣǻ˺ʩȷʵеˬ˵ûǰһΪĺֵЦô¶Ļǻܺõ
ϾֽԲôСˡΪ֮ǰᣬԡʱһδڳͷֵɻǣ˵ûоֽͱ֮ǰˡô˵أڼ˵ȷʵʲô¶ͶˡְڣԼòȫ赲ŵоԼҲʵԼɲǡͱ˵Լˣܲ
DzҲˣ˰οԼũƨn.Ҳֻİ취ԼˣһμᶨسǵԼԼԼԼҪDz
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ǶԲԼһǻԼҪںũ֤Լܻû֤أͱ˸ЦˡȻҪģ˵ûָݾˣסũҲǣϣ˶ԼɲʲôԼԼںũԼҲǵ˵ġ˵Լ˾šҲʤôü
ˣΪ㹻ˡǿԼı£ǶЦɵǿʲôǣȡǣԼԼųͷʿ䣬ܰݾˡǿĹ£߽⡣ԼĴ£ǿսƴݾȻϣǺߣԳͷҲģϾ
ǼݾʲôǺҪġЩ˲ǼѪʤھḻ˵ȻǸϣָϱЩǾӪеıӣ˵ʵڵоѹʱȴḻġ
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һЩ±ӣοɲΪһЩ±ܵסݾļҽ˵ãٶ±Ҳ˼ݾĶ֡ϾεľȻܲٴݾ˵Ǿɾݾϱ±ȥ˼ҵϱö˵ˡ֪Լı»У
ΪгͷЩϱԼϣסգҪûǣ±ӵĻԼҪˡ.?<czo<mzҲԼũ࣬ԼͿ뿪ˣϾԼ뿴ͷʿࡣ˵ȲƱȻҲûʲôĵطΪǣ֪Լ˲ٵĺôͶұԼΪũ
̫أԼǸκѸʿ䣬سسǣԼ˶ʱգɴ߸ʿسԼδؾ糷
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˶ѡԼԸʵһ˵Ҫ²Ϊ£϶Ҫסʿ䣬糷ˡ˵Ҳû취֮٣ô˵ȴڵʱõһˣҲǶΪģ𡣶ʱΣãԼҲˣھdzҪ˵ʱԼӦǸϽߣʿ
ϾDzԼµÿƴءҪںũصĻȻοDzֵáϾũ˵DzҪǺͳȴû취ȵġñ˶ԼЦҲˣʱŸʿسΪЩ¶ϣԼʲôģѾҪˣԼӻ
ҪġDzкܶԵأλǷֵʱֽһϵ˳ͷǿΣȴҲ֪Ҳֵܵסգû
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Ҳ˵ıµΣֽȷʵǿóǾˡ˵ǿΣȴҲû֮ǰһ˼Ͼ˵ֽεԼһȼĶԴվҲǸֵԼһ۵Ķ֡Ϳ˵̬ȣȴһسӦеġֽDzسǣȴʲô
˵úãûԹ⣬ûǣֽسǣȴʲô֪DzܡҪȥسǡҲDzԡDzܲ٣ϻDzôȥġݾ˲żüãسǵˣȥˡֽܲپ˳ȥǵĴõͦѵáȻûУȷʵ̫ϲǣ
ҲֻֽܲΪõû˳֡ȻȥսܲҲ˵ˣǾֻˡ֮ǰĺֵܴأһܲ˧һԱսˣǣÿ˼ֽġ
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Dzǰղаֽأ˵뿿ΣֱӾôһ˵Ҳˡ뷨ǺõģȴΪͱͷݾʿΧˣ˵ͷҲݾ6ɱDzжˣʱǿͷݾģǶԸֽ㹻ˣ»
ˣȴܱν˫ȭѵ֣úܲס˶࣬ʵԶֽ˵ȷʵΡڳͷϣղԼģҪձԼߵģԼȥˣóԵɲղ˼ңԿĻܲԼȷʵΣԤģһԼ൱Ķ֣
ĻԼҲôҪDZȺŹҪͱձԼߵģ³ͷԶֽҪġϣһȱԼյͣҺԼ
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ģģĶȥҲǡɡȻ뷨ǺõģÿΣˣֽҲΡʱæӦͷݾ䣬뷽跨Σ¶ԼȴԼȥŬҪܸˣô϶ûվ˺ũϾβĽ죬
DZޣԲò˵ǼռŵĵطũطҲû𣬶һղԼģ֪㣬ֽҲȷʵûа취ȻҲ֪ղԼҪǰĻôֻ˵ɵˡɵӣҲһ
ֽ֮ǰһأʲôöûУöԷʿߵĻᣬˣǾԲһˡʵҲôһΣȻ¶ˡΪݾʿҲˣǺͳͷݾɱһ𣬳ͷ
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ϼҶϣ˵ѪɣҲˡͷʱ϶ûôɱøӲңȷʵҲûرࡣϾһҪסdzأ˵оһҪռݳdzأʿ䡣ʱ˵ǰһûţֽȴûݾʿϾܷסһˣɷ
סǧ˰ˣݾʿ䵽νǰ˱ݾʿ֮⣬ĻҲմ˺üݾʿѪˡ˵ղֽȴЩСආûԼǸͨʿ䶼Ը˵ij̶ȡȴҲû룬ҲdzܶԸݾʿij̶ȣֽжԶͶԶ(δ)
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