presentation of documentary evidence, material evidence and audio-visual material;
出示书证、物证和视听资料；
And I'm definitely convinced that communication can be made easier and more efficient if you have proper visual material to support it.
如果你有适当的可视材料做辅助，我绝对相信交流可以更加容易、更加有效。
It can show visual material to a wide audience.
讲座能给广大听众展现视觉材料。
A representation or exhibit of key events within a particular historical period, often consisting of illustrative visual material accompanied by written commentary, arranged chronologically.
大事记年代表：依照年代时间顺序排列，将一特定历史年代阶段中的重要事件做一呈现或展示，通常包含辅以文字注释的图标。
Visual material aids the retention of information.
直观材料有助于加强记忆。
Visual material aids the retention of information.
直观材料有助于加强记忆。
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