So you get a 13-inch, 19-inch, whatever, TV, and then you should multiply that by eight and that's the distance you should sit away from the TV set.
所以在观看13英寸，19英寸等大小的电视时 所以你应该拿这些屏幕尺寸乘以8, 那才是你应该坐在电视机前的距离。