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2.xȥPӛ
҂lFʹfСԇ߀ ĕr@rƽrӖĿץPI~ıܾ͑ԓwF¿Mֻܑ{ܿץסXҪ~R ~R(@ҪƽreۣӖصԒÿᆖشӛImportantӛ)@rĹPӛҲnjƶǶ^y҂Ҫ}ɺxȥƹPӛķŵλúx헵PI~RČȥҹPӛ
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2)ʧ҂ҪҪؿPӛ]õMrgҪ_ʼx헡x헵ĕr҂ҪԼ һЩƬϢƽre۵Իx헵߅߅ųF^~RĕrԭЛ]Ќ]оų@ЩϢ]ᵽԭ෴Pӛλòȵ
@rlFһ㶼ų2߀ʣ2
3)ʣ@ɂ߀ЎN
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2 Ǜ] PIc”ķN?
X18ֵrԓǃɷNе
һҪӖPIcһ㶼ʾ̖ҪʾԼ@ЩrcԅY
ڶҪ ԾӞλ ˼Ŀһһ䣬Ҳ2-3һץȡ˼ ҪѲJRĆ~ժ ǿƌW
һµʹԓǣ
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2.x_x헌ԭĂ~ĂʲôǰǷʾe`xʲôeĂ~ReҪ
3. һһҪ 2-3 ͲҪ~R}ԭ һժ~^ȥҪMrg
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5.Ҫ߷ٶȡ߀ֹͣr ȫƪcϢ@PI~ ץȡӵPI~˼߷ٶȺ;ʶȡÿһƪ͉
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3.;Pӛ҂һֱ{ξӛٶ´`fҪ@ُ{һ¡Pӛless is more ԽԽӛúܶɶҲ] ᱾ĩ Pӛoþ ԽԽPӛԽԽPӛPI~ һǰ߾Ԕ
Y }--;Pӛ-- Һ˼PI~R--PI~ --x헷 (x헿ԷڵڶҲԷһ)eƽrXõһ֣ӏڿoBZٿĕrRΣl]Fƽr_ʸץϹr
}ģи Pӛs̖
и PӛҪWs@Ӳ܉ĉ!߀` һ~R҂hȡǰ3-4ĸgoĸ磺meteoritesmete rt @ӾͲñbܶs̖Fڽo ؏ʱ^ߵĆ~ôǰÿs̖ʡܶrgϣ