Analysis of the activated background spectrum shows that natural copper is an ideal shielding material in fast neutron nuclear reactions.

通过分析天然铜的活化本底谱，可以看出它是快中子核反应中的最理想的屏蔽材料之一。

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The common used method of getting the absorption spectrum is to subtract the background spectrum from the transmission spectrum of the sample.

得到待测样品吸收光谱的通常方法是，将样品的透射光谱和不含样品的背景光谱进行差减计算。

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The orthogonal projection coupled with visual smoothness of the background spectrum was applied in the quantitative analysis of 2-component copolymer.

运用正交投影技术，结合目视背景光谱平滑性，对二元共混物中各组分进行红外光谱定量分析。

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At the risk of oversimplifying, this is the lack of noticeably non-random fluctuations in the cosmic microwave background spectrum measured by Planck.

FORBES: Cosmic Inflation Model Gets A Boost From Planck Data

Biden sounded incredulous that Senate Republicans would consider blocking full consideration of legislation that matters to so many Americans, as demonstrated by polls that indicate overwhelming support across the spectrum for expanded background checks.

CNN: Reid to force a vote Thursday on debating gun proposals

"Lyman approached me with the idea of using the greenhouses as a background for vocational therapy for people on the autism spectrum, " Pinchbeck says.

CNN: Rose farm helps adults with autism bloom