放射性碳

例句：

1. 1. Radiocarbon dating is a method used to determine the age of organic materials.
   放射性碳定年是一种用于确定有机材料年龄的方法。
2. 2. The study of radiocarbon helps us understand the history of the Earth's climate.
   研究放射性碳有助于我们了解地球气候的历史。
3. 3. Carbon-14 isotope analysis is commonly used in archaeology to date ancientartifacts.
   碳-14同位素分析在考古学中常被用来测定古代文物的年龄。