它是一种特殊的附带设备，放置在标准高射投影仪上方并和个人电脑连接，它可以放大电脑桌面，使观众看得很清楚。

This is a special attachment that sits on top of a standard overhead projector and is attached to a personal computer, making it large enough for easy audience viewing.

youdao

它是一种特殊的附带设备，放置在标准高射投影仪上方并和个人电脑连接，它可以放大电脑桌面，使观众看得很清楚。

This is a special attachment that sits on top of a standard overhead projector and is attached to a personal computer, making it large enough for easy audience viewing.

youdao