这通常用在当存在居间用户界面交互和数据库锁定不足的时候。
This is typically used when there is intervening user interface interaction and database locking in itself is not sufficient.
企业bean控制对后端数据的访问，并且在内部管理当前事务和数据库锁定。
The enterprise beans control access to the back-end data and internally manage the current transactions and database locking.
在保持数据完整性的同时，它们控制对后端数据的访问并在内部对当前事务和数据库锁定进行管理。
They control access to the back-end data and internally manage current transactions and database locking while preserving data integrity.
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