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当前检索式 ((ALL：Technological efficiency))
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EurekAlert 39 EurekAlert! - Earth 15 Science Daily 13
Department of Energy 10 World Resources Inst 9 Center for Strategic 6
E3G 5 German Aerosapce Cen 5 Minerals Council of 5
World Business Counc 5 Bruegel 4 Environmental Protec 3
EurekAlert! 3 Department for Busin 2 Eco-Business Researc 2
Energy and Resources 2 European Space Agenc 2 Minging.com 2
The Associated Press 2 United Nations Envir 2