1718, "capable of seeing spectres;" 1815, "ghostly;" from spectre + -al (1). Meaning "pertaining to a spectrum" is 1832, from stem of spectrum + -al (1). Related: Spectrally.
实用例句
1. She is compelling, spectral, fascinating, an unforgettably unique performer.
她极具吸引力，清幽如鬼魅，令人着迷，令人难忘，是个独具特色的演员。来自辞典例句
2. The origins of stars of differing spectral types must be dissimilar.
不同光谱型星的起源必然是不一样的.来自辞典例句
3. The spectral sensitivity of various cells is very different.
各种光电管的分光灵敏度是很不相同的.来自辞典例句
4. Colour filters are not very effective in isolating narrow spectral bands.
一些滤色片不能很有效地分离狭窄的光谱带.来自辞典例句
5. Total radiation instruments employ some broad spectral band sensors.
