Intermediaries are entities positioned between a client and service provider that provide additional functionality and value-added services.
中介体是位于客户机和服务提供者之间的实体，它提供额外的功能和增值服务。
Intermediaries are entities positioned between a client and service provider that provide additional functionality and value-added services.
中介体是位于客户机和服务提供者之间的实体，它提供额外的功能和增值服务。
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