求翻译：Visual aids offer several advantages. The primary advantage is clarity. If you are discussing an object, you can make your message clearer by showing the object. If you are citing statistics, showing how something works, or demonstrating a technique, a visual aid will make you information more vivid to your audience. By using visual aids in your speeches, you often will make it easier for listeners to understand exactly what you are trying to communicate. Another advantage of visual aids is interest. The interest generated by visual images is so strong that visual aids are now widely used in many areas, not just speechmaking.是什么意思？

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