释义 |
carbon 14n.(名词)- A naturally radioactive carbon isotope with atomic mass 14 and half-life 5,780 years, used in determining the age of ancient organic, geologic, or archaeological specimens.碳14:一种碳的天然放射性同位素,原子量为14,半衰期为5,780年,用于测定古代生物标本,地质标本或考古遗迹的标本的年代
|