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当前检索式 ((ALL：natural ecosystems))
限定条件 ((专题：地球科学))
共31条，第1-20条
Science X network 580 EurekAlert 299 EurekAlert! - Earth 155
world meteorological 39 Wetlands Internation 36 US National Scientif 22
Critical Zone Explor 17 European Space Agenc 15 Centre national de l 14
US Department of Ene 14 American Geophysical 10 CNRS News 9
Commonwealth Scienti 8 SciDev.Net 7 US Geological Survey 7
US Geological Survey 6 Critical Zone Observ 5 Minging.com 5
Center for Strategic 4 NewScientist 4