The simplest light-producing reactions require an organic molecule, known as a luciferin, to be oxidised by oxygen, a process that is helped along by an enzyme known as luciferase.
最简单的发光反应需要一种叫做荧光素有机分子，在荧光素酶的帮助下，进行被氧气氧化的氧化反应。
2
The calotype was revolutionary in its use of chemically treated paper in which areas hit by light became dark in tone, producing a negative image.
卡罗摄影法对化学处理纸的使用是革命性的，其中光照区域色调变暗，形成负像。
3
If aimed toward Earth, this outpouring of energy can interact with our magnetosphere, infusing molecules in the atmosphere with extra energy that then gets released as light, producing aurorae.