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ݼʡƽмίмίϢƽ鳤ŸΥΥĿǰܼͼΪɶ2014ĽĿȴڽ챻ٱӢҵվó˵?
һdzʵҵҵ粿ų̨µġʡҵϰа취ҵϰΪٽҵҵҪʽϰҵÿÿ1200Ԫ˵λüϰҵ50%赥λÿ2000ԪһòˡʡУҵҵܻдҵԸĸУҵѧԱУУ˶ʿʿ߿10Ԫϻ50ԪϢԤԼӪЧΪ4ɾ֮Чڽ30ǰԼӪ߿гҵԼӪӦȡáԤԼӪ֤涨ҵעʡͨܲ뻥ϢɿչҵĿǰоɹѷڹۺѧڿѧԺԺPNASڵһʱ䱻ɼʱʢʱÿʱȹý屨