| 单词 | halation |
| 释义 | halation [hā`lā·shǝn] ELECTRONICS An area of glow surrounding a bright spot on a fluorescent screen, due to scattering by the phosphor or to multiple reflections at front and back surfaces of the glass faceplate. OPTICS A halo on a photographic image of a bright object caused by light reflected from the back of the film or plate. |
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