英语词汇“visual aid”是什么意思，“visual aid”的读音、用法及例句翻译-烛光网

词汇	visual aid
释义	visual aidn.（名词） An instructional aid, such as a scale model, filmstrip, or videotape, that presents information visually.直观教具：一种以视觉形式呈现出信息的教学辅助，如比例模型、幻灯片或录相等
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