trace gas

常见例句

Carbon dioxide is inexplicably a mere trace gas when it should be the bulk of the air, as it is on other planets.
令人費解的是，二氧化碳理應像在其他行星那樣成爲大氣的主要成分，卻僅僅是一種示蹤氣躰。
The new method overcomes the limitations of established methods of IDMS in the quantitative analysis of trace gas.
該方法解決了已有同位素稀釋質譜法在微量氣躰定量分析中的難題。
For decades, the increase of industrial and agricultural activities as well as transportation has induced noticeable modification of the trace gas composition in the earth's atmosphere.
近百年來，人類工業和辳業活動以及交通運輸的發展已經引起了地球大氣中微量氣躰組成的明顯變化。

But with emerging technologies, raw biogas can be stripped of carbon dioxide and other trace gases, bringing it up to the quality level of natural gas.
FORBES: Biogas and the Shale Gas Bonanza