实时虚拟参考咨询服务在图书馆服务中发挥着积极且重要的作用。

Virtual reference service is playing an active and important role in library services.

youdao

实时虚拟参考咨询服务在图书馆服务中发挥着积极且重要的作用。

Virtual reference service is playing an active and important role in library services.

youdao