通常来说，宇宙微波背景辐射粒子先发生了蓝移（它们的峰向光谱的蓝端移动），但当它进入超星系团之后又发生了红移。 这两个效果相互抵消。

Normally a CMB photon is first blueshifted (its peak shifts towards the blue end of the spectrum) when it enters the supercluster and then redshifted as it leaves, so that the two effects cancel.

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研究人员们使用仅仅超出可见光谱红端的近红外辐射测试他们的新“黑材料”。

The researchers tested their new black material with near-infrared radiation, just beyond the red end of the visible spectrum.

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但是，黑色素的吸光度下降迅速，到光谱红端它几乎什么都不能吸收了。

But, melanin's absorbance falls down so rapidly that by the infrared end of the spectrum its hardly absorbing anything at all.

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