If you absolutely must use a computer or mobile device later in the day, at least turn the screen brightness way down to semi-counter the effect of the light.
如果在睡前你不得不使用电脑或移动设备,那请将亮度调低以减弱其影响。
2
And even more interesting; what if semi transparent, coloured material occurs in some areas and partially blocks the light beam?
而且更有趣,如果是半透明,有色物质会发生在一些区域和部分被阻隔的光束里?
3
From the outside light at wavelengths longer than visible light, can make fabric presents a semi transparent state.