translation.en: They were evolved by nature in order to get a jellyfish to glow green for whatever reason, or in order to detect the coat protein of an invading virus, for example.
translation.zh: 它们通过自然进化 以便使一个水母不论以什么原因发出绿色荧光 或是以便识别入侵身体的病毒的外壳蛋白