visual radio 可视收音机 ; 视讯广播 ; 视讯电台
visual radio direction finder 目测式无线电测向仪
visual-aural radio range 目视和音响无线电信标
visual aural radio range 视听无线电导航台
Visual Aural Radio Range VAR 视听无线电导航台
visual aural VHF radio range 视听两用极高频导航台
omni-visual range radio 全向视程无线电设备
VAR Visual-Aural Radio Range 视听式无线电航向信标 ; 视听式无线电信标
Radio and Visual Service 无线电和影像处
radio and visual services division 无线电和视觉事务司
However, this purely visual system was useless in bad weather, and, by the 1930s, radio communication was coming into use for ATC.
然而，这种纯粹的视觉系统在恶劣天气下毫无用处，到了20世纪30年代，无线电通信开始用于空中交通管制。
Attaching radio devices to it is difficult, and visual sightings are too unreliable to give real insight into its behavior.
给它安装无线电设备是很困难的，而且仅凭肉眼观测也太不可靠，无法对它的行为进行确切的观察。
As a person with visual impairment himself, radio also provided an essential source of information.
作为一名视觉障碍人士，广播为他提供了重要的信息来源。
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