object-relationshipBNC²³⁶²¹³⁺¹ 基本例句 🌏对象关系;客体关系 Meanwhile, the service layer integrates ORM Object-Relationship Mapping that is an open source persistent layer software and can be used for data base access. 其中,业务层是三层结构的核心,它对上提供了统一服务调用接口,表示层可以不同的接入方式进行调用并呈现用户; fabiao