It's very useful to have some visual AIDS - some slides, pictures or graphs that help explain what you are saying.
一些辅助的工具，比如幻灯片，图片，图是·非常有用的，能帮助你更好的解释你说的话。
My teacher told me it was a good idea to use flash cards and visual aids. She also told me to be careful with my pronunciation of some words, but overall I think the presentation went well.
我的老师告诉我用卡片和视觉提示是个好主意，还告诉我要注意一些单词上的发音。
Some meetings require the presentation of data, which can be greatly enhanced by the use of appropriate audio-visual aids.
有些会需要展示数据，辅以适当的音像手段可以改善展示的效果。
Some meetings require the presentation of data, which can be greatly enhanced by the use of appropriate audio-visual aids.
有些会需要展示数据，辅以适当的音像手段可以改善展示的效果。
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