ʵϰŮҽʦ
ҽѧϵ꼶ҦʵϰƣصϢңǽϵʱѾʮˣҦҽʦ۷Ž֮ȻϱĿҦϢһؼҡҦ˻վ֮ʱȴʿԷҦվʵУٵȴʿѯʲ״Ҧæ˶Խѯ״֮ȻԸȻոհģȥ
˷źҦ˽ȥ߽Ҧһλ׳ͼڴϣҦͼסԺһµʱһο˳ǰдͼǺĴ硣ҦߵѯͼʲͼҦΪ֮һܲòҦϴҦ൱IJ
ȥʱͼǵҦҦ˿ҦȻδҦͼIJϵ֪´ϲҪ˰Ҧתȥͼ˵Ҫ´ȥɡ
ҦȥʱͼŭʵҦһһҦҲֻùԹԵĻص˲߶ȥ÷ڴµͼ¶Ҧ°ͬʱ͵ҦԵ͵ʾŰֱֵķ鷿
Ҧ̧ͷʱͼ¶ЦݣҦʱȫԭЩʿĶģҦȥ̺ӣһ߰ͼ¿ӣһ߰ͼ˳ҦϸץסͼͬʱһȻѲһֻסһ飱š
ҦʱͼͻȻѸϵ̺ƿԭ̺µ飱ŴʱѾȫijҦǰڴԼʮֳͷ·Ƥ»ǶУӣҦѹͲͬһЩŵ֪ν顣
Ҧϵ飱ŵĴøӲˣӲ飱ŴɢȶҦԵĸоͼҦǰѾ飱ŴȻҦ˼ֱӿͼ飱Ŵǻ̲ס͵͵˿һۣԼʮֳ飱Ŵͦ𣬰ͼѿӴϺҦ
ȥϴţոǰȫ飱ŴҦij൱ҦѹͲոǰͼһأͼ飱ŴҦϴκѹͲǰˣҦͻȻһͷǾͼ飱ŴԲԼѨDz֪ǻζ
Ҧϴ߳ѾϿӵͼְѿӸѵҦǰʼŪԼ飱ŴҦȻϲǰοҦϵıոЩIJͬźҦѯͼûµĻҪˡ
Ÿոתȥͼ´൱ٶȴӱıסҦѾͼƸסͼסҦıͼһֻֻʱҦ鷿ȻҦʹطʼͼǿ˫ۣͼɵҦǶԷ鷿
ͼֻͷŪʱָҦ٣ĸоҦҦӿĴϢԽԽͼӿͷŪûθɾĺѨϴ̼ѨҦܲ˸߳ĸоŴİҺҦѨ˳ͼƷ㴼ưҦİҺȫȥȻ˸ɴѹϵDZ߰ϴԧԡ֮ͼͰȫҦϡ
ڴͼǿѹҦܿؽҦĴϣҦûбǿǹͼܿĽͷҦȥŪͷҲס鷿µĴŪҦֻǸеһѣѣͼĴ̼£ټмɵİ鷿ʱҦҲзӦͼ˳Ҧ鷿¸СĹȣͼ˳һСѨʪˡ
֭ϵشۺɫСǰֵȫҽѧϵ꼶ŮʵϰҽʦҦѾ̻ͼҦȫǿҵİ˫ֽסһԷ˫壬Ҧ˫״ʯ͵鷿ͦģСʮУټԴСɫļԵ˫Ľ
ͼ˶ƽҦ˫ԲȦʽǿҸŪҦ⣬ƴţͼղϵش̼Ҧ鷿ʹͷѾѸͦҦ˶ԼĴе˼⣬ȴβǿҰĿУµذڶ壬С̲סطUšͼ֪ҦѾʼ˷ˣ㿪ʼչ
ҦëdzŨܾӳһֱ쵽ŶëͼָŨܵëСѨҦ壬СѨǰŪҦСѨͼǿҵĴ̼֮Ҳ˼ҵķӦUҪáá̲ס˫ѹסͼͷϣͼܸСѨͼȻ岻ݴǵظ̼ҦСѨ
ҦСѨõʱͼͻȻҦǰԼ飱ŵĴ͵ҦǰҦɺѹͲһƬľ˽ͼ˼סͼ飱ŴſС캬סҦȰѹͷIJݺסǰŪȴͼ飱ŴģץסҦ㷢ͼһͦӲ飱ŵĴҦСʼʽij͡
ءءšҦͱͼ飱Ŵǿij£ֱͼ飱Ŵ͵ԽȴԽпУСѨ֭ҲӿˣҦܴ̼ʼԣͼ״IJŸҦͷŪ沼˾Һ飱ŵĴΪ
˵ҪڵʱҦ£Լֿ˫ȡͼ˵U죡ͼʮֵĿ£סԼ飱ŵĴҦСѨĶڣùͷڶ¹ŪҦͼٳٲʮżء滵һͼֱͦ飱ŵôҦСѨIJҦһխʵĽȸͼޱȵʡ
Ҧ¶õЦUţϣͼѹ£ͷֱҦĻģ죡ҦСѨڴij鶯ͣӵĥ϶еǰδеˬ죬˫סͼƨɣƴԼʩѹԼҲβ϶ϣijܹӾ磡
žžžͼijͼҦˮӣŶءء١Ҧ̲סشСͼԼͼʮ£˶ѾǺˮ룻ͼ飱ŵĴԼڵϣ飱ŵĴȻͦҡģֻDZ沼Ҧˮ
ͼҦ˹ҦѨֱӶȥţһʵУҦһͼ˫ֽץסҦ˫飬ҦԼ°ڶƨɣͼ飱ŴҪѾִҦĻˡ̣̣̣ҦٶͷŴˮʹ˵ĽϴٶȷұڵҦҡͷ̲סشСŶมš
ͼţҽѧϵŮʵϰҽʦڸʵϰʱ۵òȻʥŮģѵ·ԺҲǸҪɧŮˣͼ뵽Ī˷ܣҪռҦһУ˫ֽҦϸȻβͦԭѽѵҦٶȷڡáá
ͼͦÿһγ鶯شҦĻҦ˫žҵ°ڶʮֵˡ
ͼٶҦ˫̧ڼϣѹҦСѨ׳֣ƬۺɫƬģʼس͡รš̫̫ˡҦ˷ܵҡڣͼ״سͣϵĺˮܣˮˮܲĴϡأˣ졭
˿һҽѧϵŮʵϰҽʦձƬŮţͼ͵ٶȣתķʽҦСѨﻮԲȦŪҦͼ˵Ĵ̼˷̧ܵͷͷͼƸѹͲܾûۻ˲䷢йһ㡣
һŪͼٶȻָسֻͣdz͵ٶȸأҦʱѾˡҪˣһ˲ҦˣҦסͼ飱ŴѾﵽ̶ȣһǰҺҲҪͼ飱ŴͼҲ֪ԼѾ쵽˼ޣٷͼԺ飱ŵĴҲˣһɹǵľҺͼӹڲҦҲųͼܾΪҦҪǼʹѹͲҲʵʱŵ
ҦͻһֻͼdzҦѨĶѨĸоҦҧԼ촽õͷͼ֮Ų鷿Ļʿ뿪ˡ
ϢҦƺظ࣬վͼѾ侫δ飱Ŵʱ뿪ҦѨľҺҺҦѨŴ˳ҦһԵֽԼ壬Ҧڷװ֮Ҫ뿪ʱͼȥҦ§סͼҦ֮ͼдţͷȥȷǰû˺Ҧʾ⣬ҦűߣͼƺػַҦƨҦ뿪
ҦϢȥʱλʿҦСҽԺҦҸȥȻͣȥϳҦղŽСʱľû뵽òͼȻεĸ߳оٳԿȻҦһϺ̺ѹͲʱҦȻΣתԿײźθƺҲųӵٶҦʧˣ
֣ : δ18Ͻվ se94se ڹΪڹԱܱɱ
й½ʿ룬ԸվеκηΣ