If one thing is indistinguishable from another, the two things are so similar that it is difficult to know which is which.
例句
Replica weapons are indistinguishable from the real thing.仿真武器與真武器很難區分。
英漢詞典釋義
adj.
難區分的,不能分辨的
indistinguishable twins難區分的雙胞胎
英英詞典釋義
Adjective
1. exactly alike; incapable of being perceived as different;
"rows of identical houses""cars identical except for their license plates""they wore indistinguishable hats"
2. not capable of being distinguished or differentiated;
"the two specimens are actually different from each other but the differences are almost indistinguishable""the twins were indistinguishable""a colorless person quite indistinguishable from the colorless mass of humanity"