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- Carbon dioxide is inexplicably a mere trace gas when it should be the bulk of the air, as it is on other planets. 令人费解的是，二氧化碳理应像在其他行星那样成为大气的主要成分，却仅仅是一种示踪气体。
- Moreover, aerosol can cause serious atmospheric pollution by way of absorbing or dissolving trace gas of atmosphere. 另外，气溶胶中的固态粒子能够吸附大气中的微量气体，液态粒子能溶解微量气体，它们在化学反应后生成新的物质微粒，会造成严重的大气污染事件。
- N2O, as a trace gas in the atmosphere, could cause greenhouse effect and damage the ozone lay in stratosphere. 氧化亚氮(N_2O)是大气中一种痕量气体，它具有产生温室效应和破坏平流层臭氧的双重作用。
- I've devoted my sabbatical to greenhouse trace gases. 我为了这温室示踪气体 已经牺牲了我的休息日。
- A new method applied to quantitative analysis of trace gas by three-step isotope dilution mass spectrometry (IDMS) based on technology of sizes-balls is presented. 提出了一种适用于微量气体定量分析的大小球三步同位素稀释质谱法,并给出其实验模型和不确定度理论分析结果。
- Phosphine (PH3) is a kind of extremely toxic, highly active, reductive gas, produced by the reduction of P biogeochemistry cycle, and has been proved to be trace gas existing stably in the atmosphere. 摘要磷化氢(PH3)是一种剧毒、十分活泼的还原性气体，是磷生物地球化学循环的还原产物，已被证实是大气中稳定存在的痕量气体。
- Non-dispersive Infrared (NDIR)spectroscopic technique based on Lamber-beer law is used to detect trace gas in air.In the Lamber-beer law,approximation absorbance is linear to gas concentration. 针对城市痕量污染气体检测中,所测气体浓度低、吸收弱,采用两点标定和高浓度标气定标造成吸收曲线误差增大的问题,本文提出了采用低浓度标气、多点定标的方法来获得吸收曲线的方法来建立吸收方程。
- Photoacoustic spectrometry (PAS) is a new method for trace gas detection based on the photoacoustic effect, which has high sensitivity, high selectivity and large dynamic detection range. 光声光谱技术是基于光声效应的一种新型微量气体检测技术，具有灵敏度高，选择性好，动态检测范围大等优点。
- 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。
- 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。
- Study on the Brewer-Dobson circulation and its transports for trace gases in stratosphere.Ph. Brewer-Dobson环流及其对平流层微量气体输送的研究.;中国科学技术大学博士学位论文
- Over weeks the rooms accumulated trace gases generated by a number of sources: the plants, the materials of the room, and the men themselves. 在几个星期的时间内，房间中就充满了微量气体，它们出自各种源头：植物、建房的材料以及人自己。
- I'll refill my cigarette lighter with gas. 我将给打火机再灌满汽油。
- The gas bubbled to the surface of the water. 气体变成气泡升上水面。
- As a monitoring technique with spectroscopy, the differential optical absorption spectroscopy technique(DOAS)uses the narrow molecular absorption bands to identify trace gases and their absorption strength to retrieve concentrations of the trace gases. 差分吸收光谱技术(DOAS:DifferentialOpticalAbsorptionSpectroscopy)是一种光谱监测技术,其基本原理就是利用空气中的气体分子的窄带吸收特性来鉴别气体成分,并根据窄带吸收强度来推演出微量气体的浓度。
- We are well served with gas in this town. 这个城镇煤气供应得很好。
- Differential optical absorption spectroscopy (DOAS) technique has been used to measure trace gases in the atmosphere by their strongly structured absorption of radiation in the UV and visible spectral range, e.g. SO_2, NO_2, O_3 etc. 差分吸收光谱技术(differential optical absorption spectroscopy,DOAS)是利用气体分子在紫外-可见光谱范围的特征吸收来测量其浓度含量,如SO2,NO2,O3等。
- I can't trace that letter you sent me. 我找不到你寄给我的那封信。
- He cooks his meal with a gas stove. 他用煤气炉做饭。
- He spoke without a trace of emotion. 他说话时毫不动感情。
