Some fish eyes use guanine—one of the chemical building blocks in DNA—and have white eyeshine.

一些鱼的眼睛使用鸟嘌呤——DNA 中的一种化学成分——并且有白色的眼睛。

The color of that glow, also called eyeshine, depends on what the tapetum lucidum is made of.

发光的颜色， 也称为眼光， 取决于绒毡层的成分。

And the amount of zinc does a lot to determine how yellow or green or even blue their eyeshine is.

锌的含量在很大程度上决定了眼睛的黄色、绿色甚至蓝色。