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共31条，第1-20条
Science X network 5063 Minging.com 261 EurekAlert 154
Australian Resources 79 Commonwealth Scienti 78 American Geophysical 67
Center for Strategic 65 Wetlands Internation 62 EurekAlert! - Earth 57
National Center of A 57 NewScientist 52 world meteorological 43
European Space Agenc 37 European Centre for 31 German Aerosapce Cen 29
SciDev.Net 17 Canadian Institute o 15 Centre national de l 15
Mining Association o 10 US Department of Ene 8