- devices, such as films, slides, models, and blackboards, that display in visual form material to be understood or remembered
| 单词 | visual aids |
| 释义 | Collins Concise English Dictionary © HarperCollins Publishers:: visual aids pl n
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英语词典包含188688条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。