这两种都是关系型的数据库，因而包含了关系模型及其集合处理的长处。
They are relational databases that provide the strengths of the relational model and its set processing.
扩展了embeddables的定义和用法，使其包含 embeddables 集合、嵌套式 embeddables 和包含到其他实体关系的 embeddables。
The definition and usage of embeddables was expanded to include collections of embeddables, nested embeddables, and embeddables containing relationships to other entities.
研究了生产可能性集合的公理性假设对生产可能性集合包含关系的影响，证明了满足不同公理性假设的生产可能性集合之间存在着包含关系。
The paper discusses the inclusion relations between production possibility sets (PPS) in DEA models and axiomatic assumptions on PPS, proves that there exist inclusion relations between several PPS.
研究了生产可能性集合的公理性假设对生产可能性集合包含关系的影响，证明了满足不同公理性假设的生产可能性集合之间存在着包含关系。
The paper discusses the inclusion relations between production possibility sets (PPS) in DEA models and axiomatic assumptions on PPS, proves that there exist inclusion relations between several PPS.
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