名词
中文翻译：投影机
同义词：
['former', 'formerly', 'formative']
例句：
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1.The form projector was used to create the illusion of depth in the room.
使用这个投影机在房间里创造了深度的错觉。
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2.The form projector was used as a teaching tool for students.
这个投影机被用作教学工具。
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3. The form projector was used to display information on a large screen.
这个投影机被用来在大屏幕上显示信息。