Entity Classes：被业务服务管理使用的数据模型。
Entity Classes: Data model managed and used by business services.
还可以通过Manage Subscribers业务服务管理登记。
Single enrollments can be also managed from the manage Subscribers business service.
使用这些资产可以促进重用，并充当开发、部署和管理业务服务的加速器。
Using these assets facilitates reuse and serves as an accelerator to develop, deploy, and manage business services.
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