The only additional equipment required is an ordinary glass lab slide-called a slate.

唯一额外需要的设备就是一块被称为面板的普通玻璃室玻片。

At British Telecom's research laboratories near Ipswich, England, engineers are evaluating how a tiny screen fitted to the side-frame of a pair of ordinary glass can be linked to the human eye.

在英国伊普斯威奇附近的英国电信研究实验室，工程师们正在评估如何将安装在一对普通玻璃镜框上的微型屏幕与人眼联系起来。