| 1. | In multiple-ring systems very complex patterns are produced .
多环体系常产生很复杂的谱图。 |
| 2. | Incense is burnt in many chinese homes and polycyclic aromatic hydrocarbons have been recovered from incense smoke .
很多中国人家里点香，香的烟中已经发现有多环芳香族碳氢化合物。 |
| 3. | More work is needed to uncover whether such a core exists or whether the polycyclic compounds result from the drastic treatments .
为了揭开这样一种芳核是否存在，或者多环化合物是不是由于剧烈处理所引起的问题，必须进行大量的工作。 |
| 4. | Pah poly cyclic aromatic hydrocarbon
发动机的多环芳香族碳氢化合物排放物 |
| 5. | Pah soil analysis . determination of polycyclic aromatic hydrocarbons
土壤分析.多环芳香烃 |
| 6. | Pah soil analysis - determination of polycyclic aromatic hydrocarbons
土壤分析.多环芳香茎 |
| 7. | Advances in study on photolysis of polycyclic aromatic hydrocarbons
多环芳烃光降解研究进展 |
| 8. | Pahs and normal - alkanes in urban air of beijing , tokyo and tsukuba
大气颗粒物中多环芳烃污染特征 |
| 9. | Systematic design of nth - order multiple loop feedback lowpass filters
阶多环反馈低通滤波器的系统设计 |
| 10. | Pcah polycyclic aromatic hydrocarbons
多环芳香族碳氢化合物 |
