Meaning of fēn biàn:
fēn biàn
分辨
Verb
to distinguish; to differentiate; to resolve
Tā hěn nán fēn biàn zhèxiē shuāngbāotāi.
他很难分辨这些双胞胎。
He finds it hard to distinguish these twins.
Zài hēi'àn zhōng hěn nán fēn biàn bù tóng de yán sè.
在黑暗中很难分辨不同的颜色。
It is difficult to distinguish different colors in the dark.