| 1. | All living things contain radiocarbon .
所有生物都含有放射性碳。 |
| 2. | The material in this beach has been dated by radiocarbon .
这个海滩上的物质经过放射性碳测定。 |
| 3. | When the organism dies, no new radioactive carbon is assimilated .
机体死后，不能再吸取新的放射性碳。 |
| 4. | The leaf was allowed to photosynthesize in the presence of radiocarbon .
叶子被允许同放射性碳进行光合作用。 |
| 5. | Researchers use radiocarbon to study certain biological processes .
研究人员借助放射性碳来研究某些生物过程。 |
| 6. | A radioactive isotope of carbon , especially carbon14
放射性碳碳的一种放射性同位素，尤指碳14 |
| 7. | Radiocarbon ages of soils in china
我国土壤放射性碳年龄 |
| 8. | This would involve slipping a few radioactive carbon atoms into molecules of the drugs in question
这涉及到将很多放射性碳原子放入药物分子中的问题。 |
| 9. | The researchers used radiocarbon dating on 22 pieces of microscopic charcoal found among neandertal tools in fire pits in gorham cave
研究者们使用放射性碳方法为在山洞中发现的22片木炭确定年代 |
| 10. | Using the technique of radiocarbon dating , they all agreed that the cloth dated to the 13th or 14th century ( 1260 to 1390 )
他们使用放射性碳年代测定法，都同意布料是回溯到十三或十四世纪（ 1260年到1390年） 。 |
