indiscernible

• adj. 难识别的；看不见的

in-,不，非，discernible,可分辨的。

1. difficult or impossible to perceive or discern;

"an indiscernible increase in temperature"

2. barely able to be perceived;

"the transition was almost indiscernible"

"an almost insensible change"

indiscernible (adj.)

1630s, from in- (1) "not, opposite of" + discernible. Related: Indiscernibly; indiscernibility.

The transition was almost indiscernible.

那转变几乎不能察觉.

《简明英汉词典》