| 1. | Potassium - 40 , uranium , thorium , radium , carbon - 14 , tritium and polonium are some examples
例如钾- 40铀钍镭碳- 14氚钋等。 |
| 2. | Carbon - 14 dating
碳14年代测定法 |
| 3. | Mesons and etc . of them , carbon - 14 is commonly used in assessing the age of antiquities
当中，碳- 14经常被用来鉴定古物所属的年代， |
| 4. | Mesons and etc . of them , carbon - 14 is commonly used in assessing the age of antiquities
当中，碳- 14经常被用来鉴定古物所属的年代， |
| 5. | The carbon - 14 formed will be oxidized to carbon dioxide and absorbed by plants
碳- 14是因宇宙射线撞击地球大气层而产生的，碳- 14氧化成二氧化碳后会被植物吸收。 |
| 6. | The carbon - 14 formed will be oxidized to carbon dioxide and absorbed by plants
碳- 14是因宇宙射线撞击地球大气层而产生的，碳- 14氧化成二氧化碳后会被植物吸收。 |
| 7. | Meanwhile , animals will ingest plants and hence most of the organic materials contain a certain amount of carbon - 14
同时，动物又会进食植物，所以大部份有机体都会有一定份量的碳- 14 。 |
| 8. | Meanwhile , animals will ingest plants and hence most of the organic materials contain a certain amount of carbon - 14
同时，动物又会进食植物，所以大部份有机体都会有一定份量的碳- 14 。 |
| 9. | By measuring the amount of carbon - 14 in the ancient organic materials , we can estimate the time when the organism died
透过量度古代有机体的碳- 14含量，我们便可以估计该有机体的死亡年份。 |
| 10. | By measuring the amount of carbon - 14 in the ancient organic materials , we can estimate the time when the organism died
透过量度古代有机体的碳- 14含量，我们便可以估计该有机体的死亡年份。 |
