定期性的更新包含的变更，一般只会向衍生模型的客户提供高的价值。
Periodic updates typically contain only those changes that provide high value to clients and customers of the derivative models.
建立开源模型的前提是，诸如red Hat等公司必须始终如一地通过非凡的价值、性能和易于集成与管理服务于客户。
The open source model is built on the premise that companies like Red hat must consistently serve customers through extraordinary value, performance, and ease of integration and management.
商业模型表示在公司经营下的概念及策略，其用于通过卖给客户产品或服务来增加价值。
Business model is the concept or strategy under which a firm operates to add value from selling products or services to customers.
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