colour blindness
noun(US English color blindness)
[uncountable]lack of the ability to see the difference between some colours, especially red and green; lack of the ability to see colours at all (although this is rare in humans) 色盲： 缺乏看到某些颜色之间差异的能力，尤其是红色和绿色；完全没有看到颜色的能力（尽管这在人类中很少见）the practice of treating people with different coloured skin in exactly the same way 色盲： 以完全相同的方式对待不同肤色的人的做法