| 1. | Natural radioactivity contains a store of valuable information .
天然放射性包含着许多有价值的信息。 |
| 2. | Evaluation of natural radioactivity level in environment near a urarium mine
某天然铀矿附近环境放射性水平与评价 |
| 3. | Investigation on natural radioactivity level of building materials in fujian , china
福建省建筑材料天然放射性水平调查分析 |
| 4. | Investigation on measurement methods for natural radioactivity in environmental geological survey of qingdao city
青岛市天然放射性环境地质调查中测量方法探讨 |
| 5. | Antiquities can be dated by measuring their natural radioactivity . popular techniques include " carbon - 14 dating " and " thermoluminescence dating " . they are useful tools in geological , anthropological and archaeological researches
透过量度古物内天然放射性物质的浓度，我们可以鉴定古物所属的年代，常用的技术包括碳- 14定年法和热释光定年法，对地质学人类学及考古学的研究都有莫大的帮助。 |
| 6. | Antiquities can be dated by measuring their natural radioactivity . popular techniques include " carbon - 14 dating " and " thermoluminescence dating " . they are useful tools in geological , anthropological and archaeological researches . carbon - 14 is produced when cosmic rays bombard the atmosphere
透过量度古物内天然放射性物质的浓度，我们可以鉴定古物所属的年代，常用的技术包括碳- 14定年法和热释光定年法，对地质学、人类学及考古学的研究都有莫大的帮助。 |
| 7. | Antiquities can be dated by measuring their natural radioactivity . popular techniques include " carbon - 14 dating " and " thermoluminescence dating " . they are useful tools in geological , anthropological and archaeological researches . carbon - 14 is produced when cosmic rays bombard the atmosphere
透过量度古物内天然放射性物质的浓度，我们可以鉴定古物所属的年代，常用的技术包括碳- 14定年法和热释光定年法，对地质学、人类学及考古学的研究都有莫大的帮助。 |
| 8. | In order to verify the natural radioactivity level , of tin polymetallic ore in southeast yunnan , and find out radioactive pollution in mining , dressing and smelting processes , 10 tin ores in this area were chosen to measure radionuclides ' specific activity in each kind of tin polymetallic ore , undressed ore , ore concentrate , debris and smelting slag
摘要为查明滇东南锡多金属矿天然放射性水平，了解锡矿采、选、冶过程中的放射性污染，选择了该区10个锡矿山，测量了各类锡多金属矿原矿、精矿、尾矿及冶炼炉渣放射性核素比活度。 |
