N-COUNT
视觉材料（指用于展示或说明的图画、表格、影片等）
A visual is something such as a picture, diagram, or piece of film that is used to show or explain something.
例句
Remember you want your visuals to reinforce your message, not detract from what you are saying.
要记住，使用视觉材料是为了使表达的意思更加清楚明白，而不能分散对所讲内容的注意力。