名词
中文翻译：Unknown
同义词：
['projectionist', 'projector', 'illuminator', 'illuminator']
例句：
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1. The teacher used the projector to show us the pictures.
老师使用投影仪向我们展示图片。
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2. The scientist used a projector to demonstrate his findings.
科学家使用一个投影仪来演示他的发现。
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3.The projector was not working properly, causing the presentation to be delayed.
投影仪出了问题，导致演讲延迟了。