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生物地球化学的循環
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Wikipedia definition
1. Biogeochemical cycle​In geography and Earth science, a biogeochemical cycle or substance turnover or cycling of substances is a pathway by which a chemical element or molecule moves through both biotic and abiotic compartments of Earth. A cycle is a series of change which comes back to the starting point and which can be repeated. The term “biogeochemical” tells us that biological; geological and chemical factors are all involved.
Read “Biogeochemical cycle” on English Wikipedia
Read “生物地球化学的循環” on Japanese Wikipedia
Read “Biogeochemical cycle” on DBpedia

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