youdao

Horses live in a monochrome world .light visible to human eyes however occupies only a very narrow band in the whole electromagnetic spectrum.

然而，人眼可见的光在整个光谱中只占一个非常狭窄的频段。

youdao

Glacier has a narrow spectrum on TM5, 7 bands, but moraine and snow and ice are different in evidence, therefore, TM5, 7 are advantageous bands for extracting glacier information.

冰川在TM 5、7波段光谱值范围窄，且冰碛与冰雪有明显的光谱差异，是冰川信息提取的有利波段。

youdao

And of course the performances -- by Bogie, Bacall or even Alan Ladd -- were models of mysterious force within a narrow dramatic spectrum.

WSJ: 'Ice Age' Is Slick, but Plot Is Perilously Thin

The spectrum in question is for basic one-way paging which is called narrow-band paging.

FORBES: FCC could bring on too much air