For example, heart muscle cells have two nuclei, which means the DNA could be in there twice, so this could screw up the carbon 14 dating.
例如，心肌细胞有两个核，这样，DNA计数加倍，以致碳14的核定值被带高。
Carbon dating works by comparing the amount of carbon 14, which is a less common and less stable form of carbon, to the more abundant carbon 12.
碳的年代测定工作是将碳14(碳处于这种状态并不常见，也不稳定)与碳12(碳的常见状态)的含量进行对比。
When Stevenson followed the carbon-14 trail back in time, he found carbon-14 levels change with the intensity of solar burning.
当史蒂文森依据碳-14的痕迹追溯过去时，他发现碳-14的含量随着太阳燃烧的强度而变化。
The particles interfere with the formation of carbon-14 on earth.
这些粒子干扰了地球上碳-14的形成。
Doctors Stevenson is analyzing one element—carbon-14 in ring from both living and dead trees.
史蒂文森博士正在分析一种元素——活树和死树年轮中的碳-14。
We now know the age of the glaciation accurately from radiometric dating of the carbon-14 in logs buried in the drift.
我们现在通过测量掩埋在漂流物中木头放射性的碳-14元素，以精确地确定冰川作用的时期。
Ten thousand years of tree rings show that the carbon-14 level rises and falls about every 420 years.
一万年的树木年轮显示，碳14水平大约每420年上升和下降一次。
In hindsight, though, I reflected on the practical, user-friendly advantages of one pair of chopsticks versus 14 items of silverware. And just think about the carbon footprint implications!
但事后回想，我还是认为一双筷子在实用和方便上要优于14件银器，只要想想它们的碳排放量就不言而喻了。
Plastic CARDS did not yet exist, so Shepherd-Barron's ATM accepted only checks laced with identifying traces of radioactive carbon-14.
那时还没有塑料卡，因此，谢泼德·巴伦的AT M机只能检测放射性碳- 14的痕迹。
Find a good description of the dating process here. After carbon-14 spread throughout the globe, tiny amounts of the gas were taken up by the slow-growing mosses.
在碳- 14散布到全球之后，微量的这种气体被缓慢生长的苔藓吸收。
It quickly becomes carbon-14 (with six protons and 8 neutrons).
从而迅速变为碳14(具备6个质子和8个中子)。
Over time, that carbon-14 will decay to regular carbon-12.
随着时间推移，碳14将衰变为常规的碳12。
An isotope of carbon known as carbon-14 would also be stable, as would a form of oxygen, so the organic reactions necessary for life would be possible.
碳的一个同位素碳14也是稳定的，氧的情形也是这样，因此生命必须的有机反应成为可能。
The gas at the centre of the controversy is HFC-23, a greenhouse gas which, on a weight-for-weight basis, is 14, 800 times better at trapping heat than carbon dioxide.
出于争论中心的气体是HFC-23（三氯甲烷）。以重量交换来衡量，这种温室气体包围热量的能力是二氧化碳的14800倍。
The mission's scientists have all agreed that if Levin's instruments on board the landers detect emissions of carbon-14-containing methane from the soil, then there must be life on Mars.
执行这次任务的科学家们都一致认为：如果列文在登陆舱上安装的仪器从土壤中发现含有碳14的沼气，那么，火星上就一定有生命。
Beneath that Hellenistic layer he found buildings scattered with four olive pits, which carbon-14 analysis dated to around 1000 B.C..
在希腊地层(Hellenistic layer)之下的建筑中，加芬克尔找到了四个橄榄核，经碳-14分析确定其年代为公元前1000年左右。
The radioactive carbon atoms weigh 14 atomic units, whereas run-of-the-mill ones weigh 12 units.
这种放射性的碳原子为14原子单位，而普通碳原子为12原子单位。
Effect of different carbon, nitrogen sources, pH value and culture temperature on mycelia growth of pleurotus ostreatus 14 were studied in Lab in this paper.
通过室内实验，研究了培养基中的碳源、氮源、酸碱度和培养温度对平菇14号菌丝生长的影响。
The total carbon footprint to produce one pound of beef was reduced by 14 percent since 1977, according to research by Washington State University.
根据华盛顿州立大学的研究，自1977年以来，生产1磅牛肉总碳足迹减少了14%。
Bulk carbon dioxide is typically stored as a liquid in storage tanks with capacities of 6, 14, 26, and 50 tons.
大量的二氧化碳典型地作为液体储存在容量为6、14、26、和50吨的储存罐里。
Physicists have proven through exhaustive observation and experimentation over the course of a century that it takes 5,730 years for Carbon-14 atoms to decay into a stable Nitrogen-14.
在过去一个世纪中，物理学家们透过全面的观察与实验，证明碳-14原子要花费5,730年的时间来衰变为一个稳定的氮- 14原子。
And the optimal proportions of coconut carbon and ilmenite coke, ilmenite anthracite and ilmenite are defined as 20%, 14% and 5%, respectively.
且通过比较复介电常数的大小确定了椰壳碳和钛精矿最佳配比为20%，焦碳和钛精矿最佳配比为14%，无烟煤和钛精矿最佳配比为5%；
The carbon foam structural insulated panel also includes a first layer (14) and a second layer (16) bound to a first surface and second surface of the carbon foam core.
该碳泡沫结构隔离板还包括结合到该碳 泡沫核心的第一表面和第二表面上的第一层（14）和第二层（16）。
The tests spewed vast amounts of the radioactive molecule, carbon-14, into the atmosphere, which in turn was incorporated into the DNA of the fat cells of humans.
这些试验向空气中喷发了大量的放射性分子——碳-14。这些分子被导入到了人类脂肪细胞的DNA中。
The coke formation on butadiene catalyst was studied in a flow system by means of carbon-14-labelled compounds.
在流动系统中，用碳- 14标记化合物研究了丁二烯催化剂上的结焦过程。
The Specialty Synthesis Group is seeking a Synthetic Radiochemist to be responsible for the carbon-14 radiolabeled chemical synthesis, purification and analysis.
现其特殊品合成部门诚寻一位放射合成化学研究人员，以从事碳-14 标志化合物的合成、纯化及分析工作。
Make carbon to a turtleback excuse me 14 determine how many fee to need? How to apply for, what is there relevant formalities.
请问对一个龟甲做碳十四测定需要多少费用？如何申请，有什么相关手续。
The absolute temperature changes, however, are from 5 to 14 times greater than would be expected on the basis of carbon dioxide "s own ability to absorb infrared radiation, or radiant heat."
可是，气温变化的绝对值是根据二氧化碳自身吸收红外辐射能或辐射热能的能力预期能产生的气温变化的5倍到14倍。
The absolute temperature changes, however, are from 5 to 14 times greater than would be expected on the basis of carbon dioxide "s own ability to absorb infrared radiation, or radiant heat."
可是，气温变化的绝对值是根据二氧化碳自身吸收红外辐射能或辐射热能的能力预期能产生的气温变化的5倍到14倍。
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