按生物分类系统划分的类群；分类单元
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按生物分类系统划分的类群；分类单元；按生物分类系统划分的类群；分类单元
a group of organisms forming a unit in a system of biological classification; a taxon
The species are placed into systematic groups according to their evolutionary history.
这些物种根据其演化历史被归入不同的系统类群。
按生物分类系统划分的类群；分类单元
a group of organisms forming a unit in a system of biological classification; a taxon
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