音标:[ˈkɑ:bən ˈaɪsəˌtəʊp ˌkɔmpəˈziʃən] ;
[医]碳核素组成

carbon isotope composition的用法和样例:

例句

  1. This paper determined the sulfu risotopic composition of the Mianning REE deposit,Sichuan Province,China.分析了四川冕宁大型稀土矿床硫同位素组成。
  2. The Anqing copper deposit has a complicated sulfur isotope composition ,which can not be explained by the variations of a single sulfur source or the physico-chemical conditions.安徽安庆铜矿床的硫同位素组成复杂,不能用单一硫源或物理化学条件的变化来解释。

This is Scientific Americans 60-Second Science. Im Karen Hopkin. This will just take a minute. If youve ever wondered where the Earth came from, the answer, it seems, is blowin in the windthe solar wind. Or so say scientists who, after examining sola

发表于:2019-01-08 / 阅读(61) / 评论(0) 分类 Scientific American(七)月

And how, you may reasonably wonder, can scientists know what oxygen levels were like hundreds of millions of years ago? 你也许有理由想知道,科学家们怎么会知道几亿年以前的氧气浓度? The answer lies in a slightly obscure b

发表于:2019-01-17 / 阅读(70) / 评论(0) 分类 万物简史

Trees in real forests might also share information below ground. 在真正的森林中,树木可能还会在地下交流信息。 But this was really controversial, and some people thought I was crazy, 但这个想法其实挺有争议的,一些人

发表于:2019-01-18 / 阅读(52) / 评论(0) 分类 TED演讲科学篇

The first day of the experiment, we got out to our plot 实验的第一天,我们来到了实验地点, and a grizzly bear and her cub chased us off. 突然一头灰熊和她的熊宝宝出现,把我们赶跑了。 And I had no bear spray. But

发表于:2019-01-18 / 阅读(43) / 评论(0) 分类 TED演讲科学篇

Mother trees colonize their kin with bigger mycorrhizal networks. 母树通过更大的菌根网络来覆盖住自己孩子们所在的区域。 They send them more carbon below ground. 在地下,它们给孩子们会送去更多的碳。 They even

发表于:2019-01-18 / 阅读(14) / 评论(0) 分类 TED演讲科学篇

Up to this time, the oldest reliable dates went back no further than the First Dynasty in Egypt from about 3000B.C. No one could confidently say, for instance, when the last ice sheets had retreated or at what time in the past the Cro-Magnon people h

发表于:2019-02-17 / 阅读(24) / 评论(0) 分类 万物简史