1.No signal 没有信号
　　A: Why is there no signal?
　　B: Push the Function key and the F4 key at the same time.
　　A:为什么没有信号呢?
　　B:同时按住功能键和F4键。

　　2.Power outlet 电源
　　A: Where is the power outlet?
　　B: It's usually on the wall. But it seems to be under the table in this room.
　　A:知道电源在哪吗?
　　B:一般都是在墙上,但这个房间的好像是在桌子下面。

　　3.Power strip 电源插排
　　A: I think we need a power strip.
　　B: Okay. I'll get one right now.
　　A:我想我们需要一个电源插排。
　　B:好的,我现在就去拿一个。

　　4.Make sure 确认
　　A: Mike, please make sure that the projector works.
　　B: I checked twice already.
　　A:迈克,请确认一下投影仪是不是好用。
　　B:我已经查过两次了。

　　5.Turn on the projector 开投影仪
　　A: How do you turn on the projector?
　　B: Push the power button. It'll take a while before the projector is ready.
　　A:怎样开投影仪啊?
　　B:按下开关,投影仪开始工作之前要预热一会儿。