An ontology is a classification system.
本体是一个分类系统。
The industry is still attempting to come up with a classification system that everyone agrees with.
业界还没能找出一个所有人都同意的分类体系。
Article 15 The State adopts a classification system for prescription drugs and non-prescription drugs.
第十五条国家实行处方药和非处方药分类管理制度。
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