We should come up with some kind of video system so you can see when I raise my hand.

我们应该做出一种影像系统，这样你就能看到我举手。

They do not know how to operate their video systems either.

他们也不知道如何操作视频系统。

However; just now, we're working with scientists at a university to develop an even better system for designing products through the latest computer and video systems.

然而；现在，我们正与一所高校的科学家们利用最新的计算机和视频系统合作，开发一个更好的系统以设计产品。

You need it from 4: 00 to 6: 00 and before that you need someone to assist you in setting up the audio video system.Is that right?

你要用会议室，四点到六点。在此之前你需要有人帮助你调试好音像设备。