indistinguishable

adj.

难区分的，不能分辨的；不易察觉的；无特征的；

1. Its colour makes the moth indistinguishable from the branch it rests on.
   这蛾子停在树枝上，其颜色和树枝几不可辨。
2. 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。
3. It's a sound that was indistinguishable to the human ear.
   这是一种人类耳朵不易觉察的声音。
4. His words are indistinguishable all the time.
   他的话一直让人难以理解。

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