radiocarbon

简明释义

英[ˌreɪdiəʊˈkɑːbən]美[ˌreɪdioʊˈkɑːrbən]

n. [核] 放射性碳

英英释义

单词用法

同义词

反义词

例句

1.Evidence that an ice-free corridor between two ice sheets developed when the continental ice first began to melt came primarily from radiocarbon dating.

当大陆上的冰开始融化时，两块冰原之间形成了一条无冰走廊，这一证据主要来自放射性碳测年法。

2.Using the technique of radiocarbon dating, they all agreed that the cloth dated to the 13th or 14th century (1260 to 1390).

他们使用放射性碳年代测定法，都同意布料是回溯到十三或十四世纪(1260年到1390年)。

3.Sometimes atmospheric radiocarbon levels remain constant for many decades, even centuries.

有时候大气原因会使碳素十年甚至百年保持稳定。

4.Radiocarbon dating showed that the head's age matched the king's date of death.

放射性碳显示这个头颅的年龄符合国王的死期。

5.Bacteria and bacterial residue carry additional carbon and would skew the radiocarbon date toward the present.

细菌和细菌性残余带来额外的碳，会使现时测定的年代变得不准确。

6.Virtual Dating Radiocarbon (Carbon-14) applies to once-living materials that are less than 50,000 years old.

虚拟测年放射性碳（碳14）模型应用于测量年龄小于50000年的物质。

7.If the claims of this testimony are correct, it would be consistent with the radiocarbon dating of the shroud (see below).

如果这个见证的声称是真实的话，那么裹尸布的放射性碳年代测定将会相互一致(见下)。

8."Many of the radiocarbon dates for this period cover exactly the range that's under debate," Amihai Mazar says, chuckling wearily.

“很多针对这一时期的放射性碳年代测定的精确范围都存在争议，”阿米哈伊·玛扎尔说着便有些厌倦的轻笑起来。

9.Radiocarbon dating provides a range, often spanning 200 years or more, rather than an exact date for a site.

采用放射性碳技术来测定一处考古遗址的年代，得到的并不是一个准确日期，而是一个时间跨度范围通常为200年或更久远的数值。

10.Scientists use radiocarbon dating to determine the age of ancient artifacts.

科学家使用放射性碳测年法来确定古代文物的年龄。

11.The radiocarbon method has revolutionized archaeology by providing accurate dating techniques.

放射性碳方法通过提供准确的测年技术，彻底改变了考古学。

12.Samples of wood and bone can be tested for radiocarbon content to estimate their age.

木材和骨头样本可以测试其放射性碳含量，以估算它们的年龄。

13.The radiocarbon dating technique is based on the decay of carbon-14 isotopes.

放射性碳测年技术是基于碳-14同位素的衰变。

14.Many fossils have been dated using radiocarbon methods, providing insights into prehistoric life.

许多化石通过使用放射性碳方法进行测定，为史前生活提供了见解。

作文

The study of ancient artifacts and the history of our planet has always fascinated scientists and historians alike. One of the most revolutionary techniques in this field is known as radiocarbon, which refers to a method used to determine the age of organic materials by measuring the amount of carbon-14 they contain. This technique has provided invaluable insights into the timeline of human civilization and the events that have shaped our world. 放射性碳是一种用于通过测量有机材料中所含的碳-14的数量来确定其年龄的方法。\n\nThe principle behind radiocarbon dating is based on the fact that carbon-14 is a radioactive isotope of carbon that is formed in the atmosphere when cosmic rays collide with nitrogen. Living organisms absorb carbon, including carbon-14, from their environment throughout their lives. When an organism dies, it stops absorbing carbon, and the carbon-14 it contains begins to decay at a known rate. By measuring the remaining amount of carbon-14 in a sample, scientists can calculate how long it has been since the organism died. This process allows for dating materials that are up to about 50,000 years old.\n\nOne of the most significant applications of radiocarbon dating is in archaeology. Archaeologists use this method to date ancient artifacts, bones, and other organic remains found at excavation sites. For example, by dating the remains of a prehistoric animal or a piece of wood from an ancient structure, researchers can gain a better understanding of when these items were created or when the animals lived. This information can help piece together the timeline of human history and prehistoric life. 放射性碳测年在考古学中的一个重要应用是，考古学家利用这种方法对在挖掘现场发现的古代文物、骨骼和其他有机遗骸进行定年。\n\nHowever, radiocarbon dating is not without its challenges. The accuracy of the dating can be affected by several factors, including contamination of the sample, the presence of carbon from fossil fuels, and variations in atmospheric carbon levels over time. To address these issues, scientists often use calibration curves, which are developed by comparing radiocarbon dates with other dating methods, such as dendrochronology (tree-ring dating). This helps improve the reliability of the results and provides a more accurate picture of the past. 放射性碳测年并非没有挑战，其准确性可能受到多个因素的影响。\n\nIn addition to archaeology, radiocarbon dating has applications in various fields, including geology, climate science, and even forensic science. In geology, it can be used to date sediments and understand past climate changes. In forensic science, it can help determine the age of biological materials found at crime scenes. The versatility of radiocarbon dating makes it an essential tool for researchers across disciplines. 放射性碳测年在多个领域中的应用，包括地质学、气候科学甚至法医学。\n\nIn conclusion, radiocarbon dating is a powerful technique that has revolutionized our understanding of the past. By allowing us to accurately date organic materials, it has opened new avenues for research and discovery. As technology continues to advance, we can expect even more precise and innovative uses of radiocarbon dating in the future, further enriching our knowledge of history and the natural world. 放射性碳测年是一项强大的技术，它彻底改变了我们对过去的理解。