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各种元素组成的纯净物和混合物。包括天然化学品和人工合成化学品。
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天然或人造的由各种化学元素组成的单质、化合物和混合物。
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International Soil Conservation Organization Conference
International Solar and Terrestrial Service
international sole investment
international sourcing confidence index
International Space Station
International space station
International Space University
international sports arbitration system
International Sports Press Association
International Spy Museum
international standard
international standard atmosphere
International Standard Bibliographic Description
International Standard Classification of Education
international standard code of occupations
international standard for document management
international standard for green list of protected area
International Standard for the Export, Shipment, Import and Release of Biological Control Agents and Other Beneficial Organisms
International Standard Industrial Classification of All Economic Activities
international standardization
international standard of space
international standard resister
International Standard Serial Number
international standard serial number
International Standards for Phytosanitary Measures,ISPMs
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