名词
中文翻译：投影仪
同义词：
['projector', 'projectorequipment']
例句：
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1. The teacherused a projection instrument to demonstrate the conceptof gravity.
老师使用了一个投影仪来演示重力的概念。
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2. The engineer designed a newprojector to improve the quality of theimages displayed on the screen.
工程师设计了一种新型投影仪，以改善屏幕上显示的图像质量。
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3. The students were amazed bythe clarity and brightness of the projected images on the whiteboard.
学生们对白板上投影出的图像的清晰度和亮度感到惊讶。