Carbon dating provides the archaeologist with a basic chronological framework.
碳元素年代测定法给考古学家提供了基本的年代框架。
Carbon 14 dating
英语例句库
原声例句
老友记第九季
Well, I know we start by discussing the shortcomings of carbon dating.
我知道我们一开始 是讨论碳年代测定法的缺点。
少年谢尔顿-第二季
Do you want to kick this off and tell us exactly what carbon dating is?
你想来做个开场为我们具体介绍一下什么是碳测定年代法吗？
VOA慢速英语_世界
But, the study noted, carbon dating of the comb failed to show its exact age.
但是，该研究指出，对梳子的碳年代测定未能表明其确切年份。
少年谢尔顿-第二季
There's going to be a lecture on carbon dating at the Natural Science Museum on Saturday.
周六自然科学博物馆有利用碳同位素测定年代的讲座。
侏罗纪搏击俱乐部
And as added proof, the bones of both have been carbon dated and this proves that they lived together.
作为附加证据，两者的骨头都做过碳同位素测年，这也证明了它们曾一起生活。
科学60秒 听力 2013年6月合集
Carbon dating showed that the vegetation had not seen the sun since at least near the start of the Little Ice Age, some 400 years ago.
碳定年法显示这种植物至少从小冰河时期（大约400年前）开始就从未接触过阳光。
科幻电影
Carbon dating puts the Cube here around 10,000 BC.
碳-14年代测定预估能量体是在公元前一万年来到地球的。
Reading Explorer 2
Carbon dating indicated that the man died over 5,300 years ago.
碳测年表明该男子死于 5,300 多年前。
TED-Ed（视频版）
The first breakthrough was the carbon dating.
第一个突破是碳测年。
VOA慢速英语_世界
He said carbon dating methods were used to link the footprint to the same time period as plant material found in the area.
他表示通过碳年代测定法将这枚足迹与该地区发现的同时代植物化石进行了联系比较。
SST真题机经⾳频
It's now been carbon dated from the 15th century.
它现在是 15 世纪的碳年代。
精选英语短文
Maussan cited carbon dating analysis by the National Autonomous University of Mexico that he said showed " these beings are around 1,000 years old."
莫桑引用了墨西哥国立自治大学的碳测年分析，他说该分析显示“这些遗骸已有1000年历史”。
跟马修学英语
There have been many artefacts found over time in archaeological dig sites, that based on carbon dating should not have existed during that time.
长时间以来在古迹中，挖掘出土了很多古代遗物，基于碳-14年代测定的方法本不应该存在于那个时代。
里奇大叔带你欧洲行
Legend says she was carved by St. Luke but carbon dating says she's only 800 years old.
传说说她是由圣卢克雕刻而成， 但碳测年表明她只有 800 岁。
TED-Ed（视频版）
Recently carbon dated to around 1420, its vellum pages features looping handwriting and hand-drawn images seemingly stolen from a dream.
最近的碳年代可追溯到 1420 年左右，它的牛皮纸页面上有循环的手写体和手绘图像，似乎是从梦中偷来的。
跟马修学英语
There have been many artifacts found over time in archeological dig sites, that based on carbon dating should not have existed during that time.
随着时间的推移，在考古挖掘现场发现了许多文物，根据碳测年法，这些文物在那个时期不应该存在。
美国历史频道纪录片《宇宙》
By the early twentieth century, carbon dating of Earth rocks and fossils had proven that the Sun was in existence and at temperatures warm enough to sustain life not for thousands of years, but for 3 billion.
在20世纪早期，地球岩石和化石的碳-14年代测定证实，太阳已经以足够维持生命的温度存在了不是几千年，而是30亿年。
SciShow 合集
A new study from the University of Utah let researchers figure out how old a tusk is using carbon dating, adding to genetic data about which elephant groups the tusks came from.
犹他大学的一项新研究让研究人员利用碳测年法计算出象牙的年龄，增加了有关象牙来自哪些大象群的遗传数据。
SciShow 合集
By sampling an elephant tusk from a point close to the skull, where the dentin layer is thin, the researchers were able to use carbon dating to measure how long ago the animal died.
通过从靠近头骨的点取样象牙，那里的牙本质层很薄， 研究人员能够使用碳测年法来测量动物死亡的时间。
中文百科
放射性碳定年法 Radiocarbon dating
（重定向自Carbon 14 dating）
放射性碳定年法（英语：Radiocarbon dating），又称碳测年（carbon dating）、碳十四定年法（carbon-14 dating），是利用自然存在的碳-14同位素的放射性定年法，用以确定原先存活的动物和植物的年龄的一种方法，可测定早至五万年前含碳有机物质(也可以来测无机物质，只是大部分不会)的年代。对于考古学与晚第四纪地质研究来讲，这是一个准确的定年法技术。
英语百科
Radiocarbon dating 放射性碳定年法
（重定向自Carbon 14 dating）
![Simplified version of the carbon exchange reservoir, showing proportions of carbon and relative activity of the 14C in each reservoir[4][note 3]](/uploads/202501/03/Carbon_exchange_reservoir_2.svg3650.png)
![Atmospheric 14C, New Zealand[29] and Austria.[30] The New Zealand curve is representative of the Southern Hemisphere; the Austrian curve is representative of the Northern Hemisphere. Atmospheric nuclear weapon tests almost doubled the concentration of 14C in the Northern Hemisphere.[11] The date that the Partial Test Ban Treaty (PTBT) went into effect is marked on the graph.](/uploads/202501/03/Radiocarbon_bomb_spike.svg3650.png)
![Sheep on the beach in North Ronaldsay. In the winter, these sheep eat seaweed, which has a higher δ13C content than grass; samples from these sheep have a δ13C value of about −13‰, which is much higher than for sheep that feed on grasses.[33]](/uploads/202501/03/NR_sheep3651.jpg)
Radiocarbon dating (also referred to as carbon dating or carbon-14 dating) is a method for determining the age of an object containing organic material by using the properties of radiocarbon (14C), a radioactive isotope of carbon.
The method was developed by Willard Libby in the late 1940s and soon became a standard tool for archaeologists. Libby received the Nobel Prize for his work in 1960. The radiocarbon dating method is based on the fact that radiocarbon is constantly being created in the atmosphere by the interaction of cosmic rays with atmospheric nitrogen. The resulting radiocarbon combines with atmospheric oxygen to form radioactive carbon dioxide, which is incorporated into plants by photosynthesis; animals then acquire 14C by eating the plants. When the animal or plant dies, it stops exchanging carbon with its environment, and from that point onwards the amount of 14C it contains begins to decrease as the 14C undergoes radioactive decay. Measuring the amount of 14C in a sample from a dead plant or animal such as piece of wood or a fragment of bone provides information that can be used to calculate when the animal or plant died. The older a sample is, the less 14C there is to be detected, and because the half-life of 14C (the period of time after which half of a given sample will have decayed) is about 5,730 years, the oldest dates that can be reliably measured by radiocarbon dating are around 50,000 years ago, although special preparation methods occasionally permit dating of older samples.