imperceptible
adj. 感觉不到的；细微的
副词：imperceptibly 名词：imperceptibility
近义词：slight，vague，unclear，invisible，gradual，subtle，faint，indiscernible，undetectable，light，small，tiny，unperceivable，perceptible，
英英释义
Adjective
- impossible or difficult to perceive by the mind or senses;
"an imperceptible drop in temperature" "an imperceptible nod" "color is unperceivable to the touch"
例句
用作形容词(adj.)
- The pulse is almost imperceptible.脉搏几乎摸不清。
- He gave an almost imperceptible nod.他略一点头,别人几乎无法察觉。
- The difference between the two colors is imperceptible.这两种颜色之间的差别很难区别。
- There is an imperceptible change in temperature.温度有细微的变化。