提出将知识管理理念导入图书馆虚拟参考咨询服务，把虚拟参考咨询服务作为图书馆知识管理实施的切入点的观点并进行论证。

The new thought of knowledge management could be introduced into library virtual reference service, and the implementation of library knowledge management could begin with virtual reference service.

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在介绍“间隔时间”成本预算模型的基础上，对该模型进行简化，使其适合中国图书馆界虚拟参考咨询服务的实践。

The paper, based on the model of "block of time" cost calculator, makes a simple model to accommodate for the library practice of virtual reference services in our country.

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数字图书馆中虚拟参考咨询服务通常采用三种模式。

Virtual reference service usually adopts three models in digital library.

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