spectrum
n. 范围，幅度；光谱；波谱，频谱；余象
复数 spectra或spectrums
例句
Red and violet are at opposite ends of the spectrum.
红色和紫色位于光谱的两端。
《牛津词典》
A spectrum is formed by a ray of light passing through a prism.
一束光通过棱镜就会形成光谱。
You can't jump down the spectrum.
你不能从（信念）范围上跳下来。
