Level 2 cache supports two-cycle access.
二级缓存支持两周期访问。
Because disks are slow, it is faster to get data from a level 2 cache than from the disk.
由于磁盘很慢，它从二级缓存中获取数据的速度快于磁盘。
Other functions that are standardized in JPA 2.0 are a level 2 cache plug-in, as well as query hints (also known as access intents).
JPA 2.0中标准化的其他功能包括二级缓存插件和查询提示(也称为访问意图)。
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