It can make fine visual distinctions because it is blessed with one million cones per square millimeter in its retina.
它的视网膜上每平方毫米有一百万个视锥细胞，所以它能分辨出很细微的视觉差别。
2
Cones in each half of the retina are adapted to produce different light-filtering pigments.
每半边视网膜上的锥体能够产生不同的光过滤颜色。
3
The light sensitive receivers are found on the retina and can be likened to the pixels of a digital camera chip and are separated out into two sorts: rods and cones.