in-,不，非，distinguishable,可区分的。

1. Replica weapons are indistinguishable from the real thing.

仿真武器与真武器很难区分。

2. The male of the species is almost indistinguishable from the female.

这个物种的雄性和雌性几乎无法分辨。

3. Kant's work on the critique of experience became ultimately indistinguishable from ontology and metaphysics.

康德关于经验的评论著作最终与本体论和形而上学混为一谈。

4. Poe and Edgarpo, word and echo, are in truth indistinguishable.

坡和艾德加坡,一如声和回声, 实际上亦此亦彼.

5. They are identical and indistinguishable.

他们是全同的和不可区分的.