Next to the organizational hurdles, the technical ones almost seem scant, but when it comes to the task, data versioning, concurrency (locking), and life cycle management are never simple.

仅次于组织方面障碍的是似乎看起来并不存在的技术障碍，但对于任务、数据版本控制、并发性(锁定)和生命周期管理而言，这决不简单。

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This was a difficult integration task for us, and exposed several subtle issues that were difficult to address like exception handling, concurrency, security, and persistence context management.

这对我们来说是一项艰巨的集成任务，而且曝露了不少难以解决的微妙问题，比如异常处理、并发性、安全性、以及持久性上下文管理。

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The basic task of transaction management is that the concurrency of read-write, guarantee the ACID characteristic property and the database operation correctly.

事务管理的基本任务就是有效管理事务读写操作的并发执行，保证事务的ACID特性，保证事务对数据库操作的正确性。

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