The distance between the eyes and the tv screen should be at least 6 times the screen s diagonal length 看电视时要保持室内光线充足,电视机与眼睛的距离最少应为萤光幕对角线的六倍。
2.
Watch tv under good lighting . the distance between the eyes and the tv screen should be at least 6 times the screen s diagonal length 看电视时要保持室内光线充足,电视机与眼睛的距离最少应为萤光幕对角线的六倍。