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共31条，第1-20条
EurekAlert 278 Science Daily 88 Convention on Biolog 36
Science 35 Department of Conser 24 Government of Canada 11
National Science Fou 11 Climate News Network 8 Department for Envir 7
UN Sustainable Devel 7 United Nations Envir 7 Woods Hole Oceanogra 7
Imperial College Lon 6 CNRS News 5 World Wide Fund for 5
Cary Institute of Ec 4 US Geological Survey 3 Australian Academy o 2
Eco-Business Researc 2 Global Environment F 2