| 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. | Atmospheric trace gas
大气痕量气体 |
| 4. | 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。 |
| 5. | Study on the arithmetic of trace gas concentration based on tunable diode absorption spectroscopy
可调谐二极管激光吸收光谱法测量环境空气中的甲烷含量 |
| 6. | Error analysis and improvement method of concentration measurement of trace gas in the atmosphere by differential optical absorption spectroscopy
基于可调谐二极管激光吸收光谱学对二次谐波检测噪声分析研究 |
| 7. | They fill the container with pure air made by evaporating liquid nitrogen and liquid oxygen , and add water vapour and some trace gases
他们将容器充满由蒸发液态氮和液态氧得到的纯空气，再加入水蒸气和一些痕量气体。 |
| 8. | They fill the container with pure air made by evaporating liquid nitrogen and liquid oxygen , and add water vapour and some trace gases
他们往云室里填充了由液态氮和液态氧经气化后制成的纯净空气，并添加了水汽和一些痕量气体。 |
| 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。 |
