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階級 (生物学)
Wikipedia definition
1. Taxonomic rankIn biological classification, rank is the level (the relative position) in a taxonomic hierarchy. Examples of taxonomic ranks are species, genus, family, and class. Each rank subsumes under it a number of less general categories. The rank of species, and specification of the genus to which the species belongs is basic, which means that it may not be necessary to specify ranks other than these.
Read “Taxonomic rank” on English Wikipedia
Read “階級 (生物学)” on Japanese Wikipedia
Read “Taxonomic rank” on DBpedia

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