They then have to press a keypad to indicate when a dot has appeared on the screen.
然后当一个圆点出现的在屏幕上时，他们必须按一个显示的小键盘。
2
Dot is measured in millimeters (mm), and indicates the diagonal distance between same-colored phosphor dots on the screen.
像素点以毫米为单位，表示屏幕上相同颜色的磷光点之间的对角线距离。
3
The team asked 32 volunteers to assess the accuracy of their own decision-making by identifying which screen, out of two they were shown, contained the brightest dot.