我们无法辨别哪个更好。

We can't tell which is better.

Source: Tatoeba

Sentence Composition

1 我们 wǒmen we; us; ourselves; our
2 无法 wúfǎ unable to; incapable of
3 辨别 biànbié to distinguish; to differentiate; to discern; to recognize; to tell
4 哪个 nǎge
  1. which
  2. who
5 更好 gènghǎo to be better (as in, more desirable or satisfactory)