audio and visual alarm system 音响和灯光警报系统
This is a fully electronic audio and visual detecting system that is that is surprisingly easy to use.
这仪器是一个完整的电子收音机和目视检测，这些的使用方法都是十分简单。
It also make Sectionalize teaching materials by nonlinear edit system and use it as an audio-visual materials of network broadcast, it reflect the superiority of digitized teaching materials.
并用非线性编辑系统制作辅助课堂教学的片断，它可作为网络插播的视听素材，体现了数字化教材的优越。
This Paper focuses on the English visual-audio learning website's construction principles, system structure and its application.
本文论述了英语视听专题学习网站的建设原则、系统结构和应用模式。
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