Although newspapers remain popular among old people, I believe they will be replaced gradually by electronic sources.

虽然报纸在老年人中仍然很受欢迎，但我相信它们将逐渐被电子资源所取代。

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All of the library's databases and electronic sources can be accessed through any computer connected to the university network.

通过任何连接到大学网络的计算机都可以访问图书馆的所有数据库和电子资源。

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The control system should have the protection against the interference from other electronic sources and signals.

该系统须有相当的抗干扰能力，不会被其它电子系统的通讯信号干扰。

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Light pollution can come from TV and computer screens, other electronic displays and ambient sources such as streetlights, passing traffic and neighboring buildings, in addition to overhead lighting within the home.

CNN: Unplug! Too much light at night may lead to depression

Cold-ironing allows ships at dock to plug into shore-side electricity sources to power electronic and mechanical systems needed for loading and unloading activities.

FORBES: Plug-in-Power Set for Massive Growth at Major Ports

In consequence, it is now necessary for journalists to be equipped to better protect their electronic information records, including the identities of their sources.

UNESCO: World Press Freedom Day 2013