imperceptible
imperceptibleadjective- impossible to perceive
感觉不到的,难以察觉的,细微的
his head moved in an almost imperceptible nod.
他微微点了点头。
派生imperceptibility[-ˈbɪlɪti]nounimperceptiblyadverb语源- late Middle English: from French, or from medieval Latin imperceptibilis, from in- 'not' + perceptibilis, from the verb percipere (see perceive)
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