Radiocarbon analysis suggests the wood vessel dates back to 400 B.C.

放射性分显示，这艘木制船舶来自公元前400年。

You see, that shower of cosmic rays created an abundance of radiocarbon.

那次宇宙射线簇射产生了大量放射性。

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

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

The centers of the lenses can be analyzed by radiocarbon dating to determine about when the shark was born.

可以通过放射性分的中心，来决定鲨鱼出生的时间。

Scientists at Oxford University have carried out the first radiocarbon dating.

牛津大学科学家首次对骨头进行了放射性定年法。

To get a definitive answer, the research team takes three samples from the wreck and radiocarbon dating confirms its ancient origins.

为了得到肯定的答案，研究团队从残骸上取了三个样本，放射性定年法确认了它的古老来源。

The next step is to use a process called radiocarbon dating to find a more exact date of when the person lived.

下一步是使用放射性定年法来更准确地确定这个人生活的时期。

" Scotch whiskey is Scotland's product, and we felt that being a radiocarbon laboratory in Scotland, we should take a lead on this."

“苏格兰威士忌是苏格兰的产品，作为苏格兰的放射性实验室，我们应该带头研究这个问题。”

The research team used radiocarbon dating and other techniques to precisely pin down the layers in which camel bones are found at a number of sites.

研究团队采用了放射性同位素标记法及其它来对于骆驼骨架遗骸的地点进行精确地层定位。

When taken up by trees, it left a lasting signature in tree rings—giving the scientists a key to pinpoint the year 993 in the three wood samples using radiocarbon dating.

被树木接受后，放射性会在年轮上留下持久的特征，而这给了科学家们一把密匙，使其利用放射性定年法确定三份树木样本的年份是993年。

Radiocarbon dating has shown that the No 3 and No 4 pits, at 3,000 to 3,200 years old, go back to the late Shang Dynasty (16th century-11th century BC) , Xu said.

据徐斐宏介绍，根据放射性年代测定显示，3号坑和4号坑距今已有3000到3200年的历史，可以追溯到商朝晚期 (公元前16世纪至11世纪)。