Absorption spectrum a plot of the absorbance by a substance of radiation at different wavelengths, usually of ultraviolet, visible, of infrared radiation.

吸收光谱：记录物质对不同波长的光，通常是紫外光、可见光或红外光吸收情况的图。

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Thanks to the inquiry's impressive rota of high-profile witnesses including the current prime minister, David Cameron, and two former ones, Gordon Brown and Sir John Major it is possible to plot the country's senior politicians on a spectrum of enthusiasm for press regulation.

ECONOMIST: Politics and the press