Essentially, PersistenceManager is the main interface to the JDO persistence system.
基本上，PersistenceManager是JDO持久性系统的主接口。
When the entire document is parsed, you persist each object in the List with the PersistenceManager.
当整个文件被解析时，您使用PersistenceManager持久化List中的每个对象。
The PersistenceManager contains generic methods to persist each of the entities in the business model.
PersistenceManager类包含了持久化业务模型中的每一个实体的一般函数。
If an object has changed, the changes are flushed to the database by the PersistenceManager when a transaction commits.
如果对象发生了变化，当事务进行提交时，这些变化会被PersistenceManager刷新到数据库。
The one method, manufacture, returns a PersistenceManager instance from a single instance of a PersistenceManagerFactory.
manufacture方法从PersistenceManagerFactory的单个实例返回一个PersistenceManager 实例。
The PersistenceManager class contains methods to implement all basic CRUD (create retrieve, update, and delete) operations.
PersistenceManager类包含了实现了基本的增删改查操作的方法。
JDO USES the PersistenceManager to manage the transactions, whereas entity beans delegate transaction management to the EJB container.
JDO使用PersistenceManager管理事务，而实体bean将事务管理委派给了ejb容器。
To remove an object from the database, we have to explicitly tell NHibernate to do so. The demo app's PersistenceManager contains a Delete method that performs this task.
从数据库中删除对象，我们需要明确的告诉NHibernate。
To remove an object from the database, we have to explicitly tell NHibernate to do so. The demo app's PersistenceManager contains a Delete method that performs this task.
从数据库中删除对象，我们需要明确的告诉NHibernate。
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