The rapid development of the wireless communications network has laid a foundation for mobile library's realization.

无线通讯网络的迅猛发展为移动图书馆的实现奠定了基础。

youdao

The rapid development of the wireless communications network has laid a foundation for mobile library's realization.

无线通讯网络的迅猛发展为移动图书馆的实现奠定了基础。

youdao