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ڨڡááʡڨڡ(Ѿûʶֻ֪)һ㡭ҵҪܲˡỵˡҪˡJeffûнٶȻӿһָһֱ͡ܨܡมڨڡҪҪҪҪˡ̫ˡܲˡ(ҵָijҲԽԽİڶ)ִ2Jeff뿪ҵ˸רĵСѨͣAllanҪһֱJeffĶҿңӫRҺΪָļѹе֪Ҫйˡ
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ȵʱѾDZˣҲѾ·ѵҿǵĵܵܣҵĸоﶼôࡣֱȵһᱻĺܲҡ
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ڨڡҪҡᡭܲˡڨAllanܹҴDavidMikeнȳҷƽڴϣڵΪոյĴֺ̼ʪʪжܹңҲĶԹԵšҵѹȼѾҪѹϰΪҪJeffҵĽץסֻܰСѨȫ¶ڴǰҿҺҵزϡAllanϰĵܵܶҵСѨƽȻոѾй˶кܶమҺΪСѨܽû취ܿĽֻƽִ4СѨýҵĵܵܺʣร(û뵽Ҳ)ʱҲסҵӹڣҪҪһֱҿĵܵҵСѨͰֽⷭȥĺÿÿһ¶IJ嵽ÿһ¶ڨڡAllan졭һ㡭áҡมAllanʹȫϳҾҪ̴ˣǺĸоҺҪĸ߳
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ȫʹøƨƨǷʹҼ߶ˣAllanҳһ˵ʹһ˼ӣȻȥҵˮҲ벻Զ(ҿʱѾҹ2)ҹ˵ҪʿҹеĶֻýгȥˣҲѣҾеΣҲ֪Ҫ˵ʲôڶҺúһ㶼ո۸ҵӡ
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ȥ˯ˣJeffңǵ˵ΪŮڸ߳ϲǶ(治֪˵ǻ뵰)
ȵ֮Dz뿪ҼҵıһƺǼٵһҴһĸǻѵѡ֮Ƕٴ绰(Ǹ)Լҵȥ˵Щʲôҵ尢Ѿϲ֮Ļ˵һ𣿵Ȼ֮ǵԼһžܾҸҵҫǹſֵ
Ҳκ˵ҵһֱֳкܶоDzݵġǺĻ䡭ֻһ˵Ļ䣡
֣ : δ18Ͻվ se94se ڹΪڹԱܱɱ
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