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Geochron Laboratories was the first laboratory to provide high quality isotopic analyses to geological and archaeological communities on a comercial basis.

验室是首家商务运作的、可学和考古学团体提供同位素分析的验室。

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commonplaceer, commons, commonsense, commonsensible, commonsensical, commonweal, commonwealth, Commonwealth Day, Commonwealth of Australia, Commonwealth of Dominica,

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3G, 401(K), a,

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科学60秒-科学美国人 2020年2月合集

" A problem I've been advertising as an isotopic crisis."

“我一直在宣传的一个问题机。”

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TED-Ed(视频版)

So if someone moves from one place to another, bones synthesized after that move will also reflect the new isotopic signatures of the surrounding environment.

所以如果有人从一个地方 迁移到另一个地方,在迁移后合成的骨骼会同样反映出有关 周围环境的新的标志。

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济学人 Science and technology

Its chemistry, pristine because of the Wilcocks' swift action, showed that the water in it nevertheless had the same isotopic composition as water on Earth.

由于威尔科克斯的迅速行动,它的化学成分原始的,表明其中的水与地球上的水具有相同的组成。

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济学人 Science and technology

But more recent, detailed studies which analyse the isotopic data in more detail have pushed the consensus away from farming and rubbish dumps and towards swamps.

但最近对数据进行更详细分析的详细研究已将共识从农业和垃圾场转向沼泽。

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穿越星际秘境

By  examining the isotopic composition, scientists would be able to tell if it was unusual when  compared to the dust given off by our own star.

通过检查组成,科学家们将能够判断它与我们自己的恒星发出的尘埃相比否异常。

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万物简史

Ask a pair of geochemists how something like this works, and they will start talking about isotopic abundances and ionization levels with an enthusiasm that is more endearing than fathomable.

你问两地球化学家这工么进行的,他们会滔滔不绝地谈到丰富的、离子化程度,等等,这些听上去很可爱,但不容易搞明白。

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科学60秒-科学美国人 2019年5月合集

Problem is, as scientists have taken more and more precise isotopic measurements of the Moon they've found that it's nearly identical in composition to the Earth—not some other object.

问题,随着科学家们对月球进行越来越精确的测量,他们发现月球的成分几乎与地球相同,而不其他物体。

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穿越星际秘境

By comparing the isotopic composition of the  particles Stardust collected with samples from our own solar system, it was proven that  Comet Wild 2 originated from the solar system.

通过比较收集到的星尘粒子与太阳系样本的组成,证明维尔德 2 号彗星起源于太阳系。

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科学60秒-科学美国人 2019年5月合集

Now, he says, a new theory in the journal Nature Geoscience may at least point to a way out of that isotopic crisis of the moon's chemical isotopes so closely resembling Earth's.

现在, 他说,《自然地球科学》杂志上的一项新理论可能至少指出了解决月球化学同与地球非常相似的机的方法。

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济学人 Science and technology

This, by studying the isotopic composition of ancient silver coins, has tried to draw conclusions about where the metal in a coin was mined, and thus about patterns of trade.

这通过研究古代银币的组成,试图得出关于硬币中的金属在哪里开采的结论,从而得出关于贸易模式的结论。

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科学60秒-科学美国人 2019年8月合集

So to determine how much of the stuff was truly interstellar—from beyond our solar system—the researchers used other isotopic clues to screen out quantities of iron-60 produced by nuclear reactions and cosmic rays.

因此,为了确定有多少物质真正的星际物质——来自我们的太阳系之外——研究人员使用其他线索来筛选核反应和宇宙射线产生的铁 60 的数量。

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communality, communalize, communally, Communard, commune, communes, communicable, communicable disease, communicant, communicate,

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