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来源：http://www.pewglobal.org/2017/07/13/more-name-u-s-than-china-as-worlds-leading-economic-power/pg_2017-07-13_views-on-china_3/
邓爱元
来源：
http://www.pewglobal.org/2017/07/13/more-name-u-s-than-china-as-worlds-leading-economic-power/pg_2017-07-13_views-on-china_3/