这种环境包括 -- 至少 -- 单一的源代码控制系统，全部数据库和连接系统，执行持续集成的能力。

This environment would include -- at least -- a single source control system, all databases and connected systems, and the ability to perform continuous integrations.

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在许多情况下，事务会话会持续较长一段时间，占用着数据库连接，直到完成。

In many cases, the session of transactions can take a good while, holding the database connection until complete.

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