You may be called on to present using no equipment or you may have a whiteboard slide projector overhead projector or beam projector available.
你也许会被叫去做演讲而不用任何设备，也可能会准备一块白板、幻灯机或投影仪。
Will you need a microphone and speakers, overhead, slide or movie projector, or cassette tape deck?
您需要麦克风和扩音器、耳机、灯片或电影放映机或是卡带架装置吗？
The chief equipment of electrified education includes slide projector, overhead projector, film projector, tape recorder, television set, TV camera and so on.
其主要设备包括用于幻灯、投影、电影、录音、电视和摄像等方面的机器。
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