Short excerpts from other visual and audio material may be presented in class.
电影则包括纪录片、电视片断以及主流和另类电影。
presentation of documentary evidence, material evidence and audio-visual material;
出示书证、物证和视听资料；
Pure silver is the very best performing material for audio, video or digital.
纯净银是最佳的传输材料，无论是声音、影像或数位资料。
Pure silver is the very best performing material for audio, video or digital.
纯净银是最佳的传输材料，无论是声音、影像或数位资料。
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