spectrum
/ˈspektrəm; `spɛktrəm/ n
(pl spectra / ˈspektrə; `spɛktrə/) (usu sing 通常作单数)
1 image of a band of colours as seen in a rainbow (and usu described as red, orange, yellow, green, blue, indigo and violet), formed by a ray of light that has passed through a prism 光谱.
2 similar series of bands of sound 声谱; 频谱
the sound spectrum 声谱.
3 (fig 比喻) full or wide range or sequence 范围; 系列
covering the whole spectrum of ability 涉及整个能力范围. =>Usage at data 用法见 data.