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DEFINITIVE EXAMPLES 权威例句〔opaque projector〕A projector used to view images of nontransparent materials, such as printed sheets or drawings.实物投影机：用来投射不透明物品，如印刷纸或图画等的投影机美国传统〔overhead〕An overhead projector.头顶投影机美国传统She used an overhead projector to show the statistics.她使用投影机展示统计数据。牛津商务 |