| 1. | There is an argument to express them in ground level abundance of the respective elements .
有理由把它们用相应元素的地平丰度来表示。 |
| 2. | Specific mrna sequences can be enriched for by preparing the rna from subcellular fractions .
从亚细胞部分制备RNA，可使专一的mRNA序列的丰度提高。 |
| 3. | The abundance and availability of water and nutrients in a soil ecosystem determine its fertility .
土壤生态系统中水分和养分的丰度和有效性决定土壤的肥力。 |
| 4. | Petrographically and mineralogically similar rocks quite often have different concentrations of radioactive elements .
岩石学矿物学上类似的岩石，其放射性元素丰度却往往有所不同。 |
| 5. | Variation of the heavy - element abundances in the he - shell of agb stars
壳层内重元素丰度的变化 |
| 6. | Proficiency testing of 15n abundance determination by interlaboratory comparisons
丰度的测定能力 |
| 7. | Absolute isotopic abundance measurement
绝对同位素丰度测量 |
| 8. | Isotope abundances of the elements
元素的同位素丰度 |
| 9. | Test method for uranium and plutonium concentrations and isotopic abundances
铀和钚的浓度和同位素丰度的测试方法 |
| 10. | Abundance ratio of isotopes
同位素的相对丰度 |
