名词
中文翻译：Unknown
同义词：
['projection', 'projections', 'projectionist']
例句：
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1.The projector is positioned at the back of the classroom.
投影仪放在教室后面。
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2.The scientist used a projector to demonstrate the experiment.
科学家用一个投影仪来演示实验。
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3.The projector's light beam illuminated the screen.
投影仪的光束照亮了屏幕。