1·Fireflies emit light but not heat.
萤火虫发光但不放出热。
2·Another approach is to use materials that emit light.
另外一个途径是利用能发光的物质。
3·They spontaneously emit light to return to a lower level.
接著它们会自发性地放光而回到较低的能阶。
4·They emit light which is biased towards the blue end of the spectrum.
它们发射的光偏向色谱的蓝色端。
5·Since they emit light directly, OLED displays do not need a backlight.
由于也是自身发光，OLED显示器可以不用背光灯。
6·Stars emit light which contains only certain characteristic wavelengths.
恒星发出的光只含有特定的波长。
7·One day soon, Windows that are transparent by day may emit light by night.
不久的某一天，白天透明的窗户会在晚上发光。
8·Young people in the eyes of the burning flame, the elderly eyes emit light.
青年人的眼睛里燃烧着火焰，老年人的眼睛里放射出光芒。——韦尔连。
9·This means that the excited atoms only emit light of certain specific energies.
这意味着激发原子只能发出某种特定能量的光。
10·They emit light and are then converted into oxyluciferin, which cannot produce light.
荧光素发光后转化成氧化荧光素，而后者不能发光。