It was recorded in the documents and the characters in the frescos, stone work and paintings provide the picture and visual materials of the period.

文献有记载，当时的壁画、石像、绘画中的人物提供了金元时期的图像资料。

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Audio-visual materials including oral history interviews, traditional folk songs, performances of puppets and Cantonese operas, museum weekend lectures, etc.

视听资料，包括口述历史访问、山歌、传统木偶及粤剧表演，以及博物馆历年来举办的周末讲座等。

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There are 80 of the learning materials are from America. And we use audio visual materials to help students learn English efficiently and to make learning fun!

我们使用的教材80是从美国进口的。老师通过多媒体教材使学生在轻松愉快的环境里更有效的学习英语。

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Instruction materials such as booklets, audio-visual materials, educational music CDs, magazines and posters have been custom designed and professionally produced by the Curitiba Departments of Education (Youth and Adult Education sector) and Health (Health Education Centre).

UNESCO: Country Profile: Brazil

It all was done in collaboration with the San Communities, whose representatives were trained to work with audio-visual and textual technologies to generate information and communication materials from their perspective.

UNESCO: Communication and Information

Totaling in excess of 5, 000 linear feet, UMG's gift is the largest single donation ever received by the Library's audio-visual division and the first major collection of studio master materials ever obtained by the nation's oldest cultural institution.

ENGADGET: Library of Congress receives 200,000 vintage master recordings from Universal, will stream them online