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单语范例（未经PONS编辑处理）
Its teaching aids include charts, museum specimens, models, and transparencies for an overhead projector.
en.wikipedia.org It is designed for overhead projector use.
en.wikipedia.org The first overhead projector was used for police identification work.
en.wikipedia.org But that meant that whenever exhibits were put on the overhead projector, we couldn't see that.
www.democracynow.org Teachers should also remember that students with albinism might struggle to read from overhead projector screens because of the glare.
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