With direct service interaction, as discussed in relation to Figures 1 and 2, the provider must satisfy all characteristics described in the service specification.
在图 1 和图 2 所示的直接服务交互中，提供者必须满足服务规范中描述的所有特征。
However, the sequence of use case steps is often mandatory only in relation to the next interaction with an actor.
然而，用例步骤的顺序通常仅仅关系到参与者的下一个交互。
Information port construction and information service is the dialectical relation of interaction and interstimulation.
信息港建设与信息服务是相互影响、相互促进的辩证关系。
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