1.Back up 后退
　　A: John, could you back up one slide please?
　　B: Sure.
　　A:约翰,请退回到上一页好吗?
　　B:好的。

　　2. Connect the projector to the computer 把投影仪连接到电脑上
　　A: How do you connect the projector to the computer?
　　B: Use the cable. Connect one end to the projector input, and the other end to the computer output.
　　A:你知道怎样把投影仪连接到电脑上吗?
　　B:用这根数据线,一边连接投影仪的输入口,另一端连接电脑的输出口。

　　3.Get out of the presentation 结束演示
　　A: How do you get out of the presentation?
　　B: Push Esc, and you'll be out of the presentation.
　　A:能告诉我演示完毕怎样退出吗?
　　B:按 Esc 键,你就可以结束演示了。

　　4.Input selection 输入选择
　　A: How come I cannot get the signal?
　　B: Did you play with the Input Selection?
　　A:我这儿怎么没有图像呢?
　　B:你调整输入选择了吗?

　　5.Plug it in 插电源
　　A: Did you plug it in?
　　B: I did. It still dosen't work.
　　A:你插电源了吗?
　　B:插了,但还是不好用。