adj.幽灵的；光谱的
There was no change in his father's position, or in his spectral look. 他父亲的姿势一点没有更动，阴沉的脸色也依然不变。
At times he seems rather ordinary. At other times ethereal, perhaps even spectral. 有时他好像很正常,有时又难以捉摸,甚至像个幽灵。
Beings without form and intelligences without bodies are spectral ghosts guaranteed to mislead. 无体生命和无形智能，注定是引人误入歧途的鬼怪幽灵。
I am studying spectral classification. 我在学习光谱分类。
The visible is the most well-defined spectral region. 可见光是含意最明确的光谱波段。
双谱
