There are also system actors, external systems that your system interacts with, which in the case of data warehouse projects, would be the legacy data sources that you extract data from.

还有一些系统参与者，它们是与您的系统进行交互的外部系统，在数据仓库项目的例子中，将是您要从中提取数据的遗留数据源。

youdao

Do you develop your own products, work on customer projects, offer consulting services, or maintain and support a legacy system?

您是在开发自己的产品、从事客户项目、提供咨询服务，还是维护和支持遗留系统？

youdao

The granularity of the project is important: smaller projects should use service adaptors and service proxies to connect to legacy functionality, or functionality not SOA-enabled.

项目的粒度非常重要：较小的项目应该使用服务适配器和服务代理来连接遗留的功能或者不支持 SOA 的功能。

youdao

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