| 单词 | imperceptible | 
| 释义 | imperceptibleadjective  im·per·cep·ti·ble  ˌim-pər-ˈsep-tə-bəl     : not perceptible by a sense or by the mind : extremely slight, gradual, or subtle  imperceptible differences    imperceptibly    ˌim-pər-ˈsep-tə-blē   adverb imperceptible adjectiveas in invisible   not perceptible by a sense or by the mind a slight difference in hue between the two glasses that's imperceptible unless they're placed side by side   Synonyms & Similar Words Relevance     
 Antonyms & Near Antonyms 
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