indistinguishable

US /ˌɪn.dɪˈstɪŋ.ɡwɪ.ʃə.bəl/
UK /ˌɪn.dɪˈstɪŋ.ɡwɪ.ʃə.bəl/
"indistinguishable" picture
1.

无法区分的, 难以辨别的

not able to be identified as different or distinct

:
The twins were almost indistinguishable.
这对双胞胎几乎无法区分
The fake banknotes were indistinguishable from the real ones.
假钞与真钞无法区分