That is, JPA focuses on object-relational mapping (ORM) (note that there are JPA providers who support other database models besides relational database, but this is outside the scope of what JPA was designed for).
也就是说，JPA专注于对象关系映射（ORM）（请注意，除了关系数据库之外，还有JPA提供程序支持其他数据库模型，但这超出了JPA的设计范围）。