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。