carbon dating

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Legend has it that the tree is 7000 years old, but Sussman has found carbon-dating studies indicating it is a mere 2200 years old.
傳說這種樹已經7000嵗了，但是囌斯曼發現碳測年的結果表明它衹有2200年的歷史。
The archaeologists said in the statement that radio-carbon dating put the construction of the circle of bluestones at between 2,400 B.C. and 2,200 B.C., a few centuries later than originally thought.
考古學家在一份聲明中說，經放射性碳測年法鋻定，環形巨石陣應該建造於公元前2400年至公元前2200年之間，比之前的推測晚了幾百年。
According to the result of environment tritium math-physical model and carbon-14 age dating, think the renew ability of the thermal water in study area is confined and inhomogeneity.
根據環境氚的數學物理模型計算和碳-14測年結果，關中盆地熱水可更新性具有有限性和非均一性特點。

The team collected pieces of the coral and then used radio-carbon dating methods to find their age.

Although there were no machines for detecting them systematically before 1935, cosmic rays have left their footprints in the geological record by creating radioactive elements such as the carbon-14 used in carbon-dating.
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To do the sleuth work for the various lawsuits, Koch has assigned private investigators (who he described as ex-CIA and ex-FBI agents) tasks ranging from tracking down printers of counterfeit wine labels, to carbon-dating bottles and listening in on a phone call with Greenberg.
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a method of calculating the age of extremely old objects by measuring the amount of a particular type of carbon in them

Carbon dating is a system of calculating the age of a very old object by measuring the amount of radioactive carbon it contains.