| 1. | These trace gases are not detectable by smell in any but the most heavily polluted atmosphere .
这些微量气体除了在污染最严重的大气外，是不能凭嗅觉察觉到的。 |
| 2. | It is informative to contrast this with the observed values of various trace gases in the atmosphere .
这一值与观测到的大气中各种微量气体值作一比较是有益的。 |
| 3. | How to promote the precision of gas - micro - analyzer
提高微量气体分析仪的测量精度 |
| 4. | Gas injection system for the shanghai ebit facility
装置微量气体注入系统的研制 |
| 5. | The study of trace gas detection technology is expected to solve this problem
激光光谱分析技术将为微量气体检测提供新的高性能的技术手段。 |
| 6. | Besides , measurement of these minor gases and n2o has been conducted in the same site during autumn of 1992
此外， 1992年在相同地点对这几种气体和n _ 2o作过短期观测，获取了这些微量气体的少量资料。 |
| 7. | Therefore the study of atmospheric co , ch4 , and n2o is very significant for the study of climate and atmospheric environment
所以对co 、 ch _ 4和n _ 2o等微量气体的研究在气候与大气环境方面都具有重要意义。 |
| 8. | In this paper , the theory and application of photoacoustic spectroscopy and cavity enhanced absorption spectroscopy are studied in detail
本文对微量气体光声光谱与腔内增强吸收光谱检测技术的理论与应用做了较深入的研究。 |
| 9. | The quantitative determination of trace gas concentration is involved in the study of biological trace gas exchange , air pollution and medical diagnosis
生物组织微量气体交换研究、大气污染监测和医疗诊断等领域都涉及到微量气体的定量分析。 |
| 10. | Abstract : a reduction in carbon dioxide emissions in one of the key elements of endeavours to protect the earth ' s atmosphere from trace gases which affect the climate
文摘:减少二氧化碳排放是防止地球大气层受到对气候有影响的微量气体之影响的一种努力。 |
