Therefore, Academic Virtual Service Reference System as the network extension of teaching and research work of university library also plays a very important role.

因此，高校虚拟参考咨询系统作为高校图书馆参与教学和科研工作的网络延伸也同样具有非常重要的作用和地位。

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This paper discussed the application of boundary-scan technology to prototype board debugging and the problems of extension to volume board manufacturing, system integration, and field service.

本文讨论了边界扫描技术在样机电路板调试中的应用以及扩展到产品板制造、系统集成和现场服务等方面应用的技术问题。

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But some problems were emerged such as extension system, extension method and service system.

但是在植保技术推广体系、推广方法、服务体系上暴露出一些问题。

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