0 a method of calculating the age of extremely old objects by measuring the amount of a particular type of carbon in them -- （计算古物年代的）碳年代测定法，碳定年法
The spread of accelerator based carbon dating techniques may help clear up the issue.
In this case, carbon dating and similar techniques are used to determine the age of the sample.
Carbon dating has shown that there was human activity going back 20 000 years.
Carbon dating findings show that the fjord was free of glacial ice approximately 6,500 years ago.
Some isotope ratios are used to determine the age of materials for example as in carbon dating.
Several samples collected from the site have been subject to carbon dating.
Carbon dating shows that the skull, which should be 40,000 years old, is suspiciously only 25 years old.
Carbon dating and stratigraphic analysis showed the remains to be 10,000 to 13,000 years old.
