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Deutsch-Chinesische Enzyklopädie, 德汉百科
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*World overviewRivers in AfricaRivers in North AmericaRivers in South AmericaRivers in asiaRivers in EuropeRivers in OceaniaMountains in AfricaMountains in AntarcticaMountains in AsiaMountains in EuropeMountains in North AmericaMountains in OceaniaMountains in South AmericaGlacierIslands in AfricaIslands in AsiaIslands in EuropeIslands in Central AmericaIslands in North AmericaIslands in OceaniaIslands in South AmericaCaribbeanKarstArtificial water channels in the worldCountries of africaNorth American countriesCountries of OceaniaCountries of South AmericaStrait of the worldTunnel of the earthVulcanWaterfallWest Indies
移民美国100年,1919年至2019年/100 Years of Immigration to The U.S., 1919 to 2019