So we can figure out the chemical make up of the other stars by comparing this spectrum pattern it has to the pattern of the element in the libraries.

所以我们可以我们可以通过以库中的光谱样式和它们有的光谱样式来进行对比从而估算出别的行星的化学成分。

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The beetle larvae have a distinct chemical make-up, which can be traced through the feathers and blood of birds that eat them.

甲虫幼虫含有独特的化学成分，从猎食它们的鸟类的羽毛和血液中可以找到这种成分的痕迹。

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Ocean scientists study the chemical make-up of the ocean, weather patterns, the geography of the ocean floor, and many other areas.

海洋科学家研究海洋的化学成分、气候模式、海底地貌以及许多其他领域。

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He added that the exact chemical make up of the herbal extract and its effects on the gullet were unclear, and that the anti-acid drug used was one of the least effective available to doctors.

BBC: Herbal 'heartburn' treatment

It will examine the chemical make-up of more than a million stars up to 20, 000 light years away.

FORBES: Searching for the Siblings of the Sun

It is therefore less sensitive to the precise chemical make-up of the site.

ECONOMIST: Nanotechnology in biology