In a presentation, we should only use visual aids if they are necessary to maintain interest and assist comprehension.

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• Supporting details are those facts and ideas that prove or explain the main idea of a paragraph or an essay, and all types of su
• The actual production and comprehension of the speech by speakers of a language is called performance.
• （） words are those we don’t know but won’t block our comprehension in reading.
• 虽然广告具有ACCA功能（Awareness, Comprehension, Conviction, Action），广告翻译时，译者却不需要考虑这些功能。