| 词汇 | radioactive dating |
| 类别 | 英汉双解翻译词典 |
| 释义 | radioactive dating 释义 放射性测定年代 例句 1·It lived around 125 million years ago, based on the dating of radioactive elements in the sediments that encased the fossil. 研究者通过对包裹化石的沉积层进行放射性元素年代测定，推断出中华龙鸟生活在1.25亿年前。 2·Most famously, uranium-238 decays into lead-206 with a half life of 4.5 billion years, though radioactive rubidium and samarium are also useful for dating things billions of years old. 最为有名的就是铀- 238衰变为铅- 206的半衰期为45亿年，当然放射性铷和钐也同样对测算几十亿年前的物体的年龄很有用。 |
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