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共25条，第1-20条
US Geological Survey 167 US Geological Survey 70 Seismological Societ 15
EurekAlert 9 Science 9 Scripps Institution 7
Environmental Monito 4 United States Depart 4 Bureau of Ocean Ener 3
RAND Corporation 3 British Antarctic Su 2 National Academy of 2
The Center for Syste 2 Woods Hole Oceanogra 2 World Wide Fund for 2
us environmental pro 2 Association of Ameri 1 Eco-Business Researc 1
Environmental Protec 1 Government of Canada 1