JPA 2.0 提供的解决办法通过静态地公开相同的持久化属性实例化名为 Person_的元模型类（对应于 Person）。

The solution that JPA 2.0 provides is the ability to instantiate a metamodel class named Person_ that corresponds to Person by exposing the same persistent attributes statically.

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实例属性中可以包含您喜欢的任何类型的持久性。

Any sort of persistence you like can be contained in the instance attributes.

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图 6 展示了缓存实例的属性。

Figure 6 shows the cache instance properties.

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And then there were a couple of other ones in there that I hadn't actually dealt with.

这些一同被称作实例的属性,实际上这里还有一些东西,我没有处理到。

麻省理工公开课 - 计算机科学及编程导论课程节选

Not so weird, you've actually seen it before.

因此每个实例有一些内在的，或者将会有一些内在的属性。

麻省理工公开课 - 计算机科学及编程导论课程节选