查询词典 carbon dating

Nowadays scientists can answer many questions about the past through a technique called radiocarbon, or carbon-14, dating.

现在科学家们能通过一种被称为放射性碳，即C-14的一种技术来测定年代，回答许多关于过去的事情

These pioneers have included the scientists or teams that discovered many of the fundamental particles of matter, analyzed the cosmic microwaves left over from the earliest epoch of the universe, developed carbon-14 dating of ancient artifacts, decoded the genetics of viruses, and created an entirely new state of matter called a Bose-Einstein condensate.

这些先驱者包括科学家或小组，发现了许多基本的物质粒子，分析了宇宙微波遗留下来的时代最早的宇宙，开发碳14测年的古代文物，破译基因的病毒，并建立了一个全新的物质状态称为玻色爱因斯坦冷凝物。

Within a fairly short time after their discovery, historical, paleographic, and linguistic evidence, as well as carbon-14 dating, established that the scrolls and the Qumran ruin dated from the third century B.C.E.

在他们的发现之后相当短的时间里，历史的，古文书学的，语言学，和碳-14测定证据确立了古卷和库姆兰会社遗址开始于公元前第三世纪直到公元前68。

Hapgood goes on to mention to two areas where he finds much of his evidence, in data derived from studies of geomagnetism and from carbon 14 dating.

Hapgood 接着提到二个他找到许多证据的地方，数据来源于地磁研究及碳14测定。

The coring was successfully operated on the winter ice-cover of the lake in 2000 and the pioneer practice of the ""off-the-ice"" coring proves to be very useful and economic for taking quality cores from lakes in northern China.A multidisciplinary investigation has been carried out on core HQH4, one of the three 11-m-long cores. Results from previous investigation include lithostratigraphy, radiocarbon dating, paleoecology of Ostracoda, stable isotopic record of ostracod shells, total nitrogen and organic carbon, C/N ratio, 81 C of organic matter etc.

在对深度为11米的HQH4岩芯开展了~(14)C年代学、岩性地层学、介形类古生态及介壳稳定同位素、有机碳和总氮及C/N比值、有机碳同位素等多学科综合分析测试和研究工作的基础上，本硕士学位论文研究侧重开展了：1HQH4岩芯烧失量(Loss-on-ignition)的系统分析测定及该地层学变量的古湖泊和环境变化意义的研究；2沉水植物川蔓藻化石种子生态学特征及其在黄旗海湖泊水位重建和气候变化研究方面的重要意义的研究。

It was at Chicago that REM sleep was discovered and carbon 14 dating was developed.

这是在芝加哥的REM睡眠被发现，碳14测年的开发。

Based on technical processing of high-resolution SPOT images and aerophotos, detailed mapping of offset landforms in combination with field examination and displacement measurement, and dating of offset geomorphic surfaces by using carbon fourteen (14C), cosmogenic nuclides (10Be 26Al) and thermoluminescence methods, the Holocene sinistral slip rates on different segments of the Altyn Tagh Fault are obtained. The slip rates reach 17.5 mm/a on the central and western segments west of Aksay Town, 11 mm/a on the Subei—Shibaocheng segment, 4.8 mm/a on the Sulehe segment and only 2.2 mm/a on the Kuantanshan segment, a easternmost segment of the ATF. The sudden change points for loss of sinistral slip rates are located at the Subei, Shibaocheng and Sulehe triple junctions where NW-trending active thrust faults splay from the ATF and propagate southeastward.

在高分辨率SPOT卫星数字影像和大比例尺航片处理、断错地貌制图、野外核实与位移测量基础上，利用宇宙成因核素（10Be、26Al）、碳十四（14C）和热释光等多种测年手段，厘定了各断错地貌面的形成年龄，得到了阿尔金断裂带不同段落全新世左旋走滑速率：阿克赛以西的中、西段左旋走滑速率可达17.5 mm/a，肃北—石包城段为11 mm/a左右，疏勒河口段减少到4.8mm/a左右，东端宽滩山段仅约2.2 mm/a，左旋走滑速率突变点位于阿尔金断裂带中东段存在分支活动逆断层向南东扩展的肃北、石包城和疏勒河等三联点上。

Organic matter less than 7000 years old can be dated using radiocarbon dating, This uses the fact that the isotope carbon-14 is found in the atmosphere and taken in by plants when they photosynthesize, and subsequently assimilated by the animals that feed on them.

在7000年以内的有机体可以用放射性碳来推测它的年代。

Radiocarbon dating is basically this: a radioactive isotope of carbon, C-14, is formed in the atmosphere by cosmic rays.

放射性碳测年，基本上这个：放射性碳同位素、碳14是由大气中形成的宇宙射线。

P in Shule River Alluvial Fan Oasis in Gansu subsidized by CNSF. Through field geological and environmental observations and sampling, quartz OSL dating, organic carbon ~(14)C dating, as well as analysis of TOC,grain size and Pollen assemblage of the samples from ten sediment profiles in front fine grain sediment zone of the Shule River Fan, the results obtained as follows:(1)The vegetation evolution history on Shule River Alluvial Fan and circumjacent since about 13 ka B.P. could be divided into 6 phases: about 12.1-13.1ka, a sparse coniferous and broadleaf trees - shrub grassland, cold and wet climate; 9.2-12.1ka, shrub grassland, temperature rising but precipitation and humidity getting down; 5.8-9.2ka, sparse forest with the most flourish shrub grassland under the optimal climate; 4.3-5.8ka, coniferous and broadleaf mixed forests -shrub grassland, temperature rising slightly and getting dry; 4.3-2.8ka, grass vegetation and climate became more dry; 2.8-2.3ka, coniferous forests -shrub grassland, precipitation and temperature getting down, but a higher relative humidity.

本文依托于&甘肃疏勒河冲积扇5万年来古天气环境与古水文演化&项目，以疏勒河冲积扇为研究对象，通过对疏勒河冲积扇扇缘细土带全新世古天气和古水文演变进行了20余个剖面的观测和取样、石英OSL和~(14)C测年、粒度组成和TOC分析以及孢粉鉴定，获得了以下成果和熟悉：(1)距今约13ka年来冲积扇和周边植被演化经历了6个阶段：约13.1～12.1ka，以针叶林为主的针阔混交林～灌丛草原，天气冷湿；12.1～9.2ka，灌丛草原，气温升高，降水量较低；9.2～5.8ka，疏林灌木草原，植被茂盛，温度和降水最佳；5.8～4.3ka，以针叶树为主的针阔混交林～灌丛草原，气温较高，降水减少；4.3～2.8ka，草原植被，天气变干；2.8～2.3ka，针叶林～灌木草原，降水减少，温度降低，相对湿度有所增加。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。