1. The synthetic material is indistinguishable from real silk, but much cheaper.
    这种合成衣料与真丝难以区别，但便宜得多。

1. 不能辨别的：indistinctly 朦胧地 | indistinguishable 不能辨别的 | indistinguishableness 无差别

2. indistinguishable

2. 难分辨的：indistinction 无区别 | indistinguishable 难分辨的 | inditron 指示管

3. 不能区别的：Gulf of Aden 亚丁湾 | indistinguishable 不能区别的 | Mediterranean Sea 地中海

4. 区別：indistinct boundary ==> 不清晰边界 | indistinguishable ==> 区別ができない | indium ==> 铟=>インジウム

1. 难以区别的;难以分辨的
    If one thing is indistinguishable from another, the two things are so similar that it is difficult to know which is which.

    e.g. Replica weapons are indistinguishable from the real thing.
           仿真武器与真武器很难区分。

1. not capable of being distinguished or differentiated

    e.g. 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

    Synonym: undistinguishable

2. exactly alike
    incapable of being perceived as different

    e.g. rows of identical houses
           cars identical except for their license plates
           they wore indistinguishable hats

    Synonym: identical