| 单词 | subvisual | 
| 释义 | subvisualadjective  sub·vi·su·al  ˌsəb-ˈvi-zhə-wəl  -zhəl; -ˈvizh-wəl  variants  or sub-visual    : not visible without the aid of special instruments : subvisible  … once you have seen the subvisual world through the microscope, you stop inventing demons and magic as the agents of change. Auroras have a wide range of brightness, usually rated from 0 to 4 on a logarithmic scale … in which each number is 10 times brighter than the previous one. Zero means subvisual, detected only with instruments. | 
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