translation.en: So, the process and the technology -- basically, first we needed an engineering solution. So, you know, we have a FireWire camera, it looked at an infrared pointer.
translation.zh: 嗯，谈到流程和技术， 简言之，首先需要一个工程之道。你看， 我们放置了一台1394火线接口的摄像头来追踪红外指针。