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。