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共31条，第1-20条
Science X network 139 EurekAlert 122 Minging.com 85
Commonwealth Scienti 54 U.S. Energy Informat 42 EurekAlert! - Earth 32
Natural Resource can 11 International Energy 8 US Geological Survey 8
Australian Resources 7 Critical Zone Explor 7 Department of Energy 7
CNRS News 6 Centre national de l 6 European Space Agenc 6
Canadian Institute o 5 German Aerosapce Cen 5 Critical Zone Observ 3
International Gas Un 3 BP Global 2