可以考虑利用一个活动挂图，投影仪或者一个黑板。
Consider using a flip chart, overhead projector or a blackboard.
面对观众讲话，而不是对着你的教具，如活动挂图或者投影。
Speak to the audience... NOT to the visual AIDS, such as flip charts or overheads.
活动挂图，配套挂图：一种由很多页组成的顶部夹在一起的图表，翻动时能够连续地展示资料。
A chart consisting of sheets hinged at the top that can be flipped over to present information sequentially.
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