名词
中文翻译：Unknown
同义词：
['projector', 'television screen例句：1. This projector is very easy to operate.（这款投影仪操作起来非常简便。）']
例句：
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1. This projector is very easy to operate.
这款投影仪操作起来非常简便。
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2.The teacher demonstrated how to use the projector.
老师演示了如何使用投影仪。
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3.The projector was used in the classroom for demonstrations.
在课堂上，投影仪被用来做示范。