在用CO激光监测大气微量气体或污染气体时，必须根据实际大气状况，进行必要的水汽订正。
When monitor trace gases of the atmosphere or pollution gases by means of co laser, one must correct for water vapor attenuation according to the actual condition of the 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。
These trace gases are not detectable by smell in any but the most heavily polluted atmosphere.
上周在华盛顿一个语气强硬的演讲中，斯特恩先生表示，如此微量缩减将无助于影响改变气候气体的大气浓度。
In a tough speech in Washington last week, Mr. Stern said that such modest reductions would do little to affect atmospheric concentrations of climate-altering gases.
差分光学吸收光谱法已经变成了测量大气中微量气体浓度常用的方法。
Differential optical absorption spectroscopy has become a widely used method to measure trace gases in the atmosphere.
差分光学吸收光谱法(DOAS)已经成为测量大气中微量气体浓度广泛应用的方法。
Differential optical absorption spectroscopy (DOAS) has become a widely used method to measure trace gases in the atmosphere.
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。
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.
氧化亚氮、甲烷是大气中重要的微量气体，对全球变暖和大气化学有重要作用。
N2O and CH4 are important atmospheric trace gases, which play significant roles in the global warming and atmospheric chemistry.
氧化亚氮、甲烷是大气中重要的微量气体，对全球变暖和大气化学有重要作用。
N2O and CH4 are important atmospheric trace gases, which play significant roles in the global warming and atmospheric chemistry.
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