客户端总是维护与服务器的连接。

The client always maintains a connection with the server.

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两辆ZBV将具备前向扫描能力，并且所有的系统都包括服务与维护训练以及扩展担保。

Two of the ZBVs will be equipped with Forwardscatter capability, and all of the systems include service and maintenance training, and extended warranty.

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域为业务对象提供服务检索和维护、封装业务逻辑、定位以及与对象和服务相关联的格式。

The domain offers retrieval and maintenance services for the business object, encapsulating business logic, location, and the format associated with its objects and services.

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