对于异步复制，顺序是一样的，但是无需等待目标节点确认已经收到写入操作，就可以完成生产节点上的写入操作。
With asynchronous replication, order is preserved, but the write is allowed to complete without waiting for an acknowledgement from the target node that the write has been received there.
这个结束的演变也已经完成，解决方案也已经部署到它的用户环境中去，这个方案已经移交给了生产支持或者下一个项目。
An evolution of the solution is complete, and a solution has been deployed to its users; the solution has also been handed over to production support or the next project.
移植一个已经存在的项目往往比移植一个从零开始的项目更加富有挑战性，这是因为移植项目通常是在生产性系统的上下文中被完成的。
Migrating an existing project is often more challenging than when a project is started from scratch, since a migration project is usually done in the context of a productive system.
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