overhead projector
noun [ C ] uk/ˌəʊ.və.hed prəˈdʒek.tər/ us/ˌoʊ.vɚ.hed prəˈdʒek.tɚ/ (abbreviation OHP)
投影仪
a device that makes large images from a flat, transparent sheet and shows them on a white screen or wall
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