三束投影仪TBP ？
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。
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。
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