combination of gases meaning in English

气体的混合

The atmosphere they create has a combination of gases such as hydrogen, water, ammonia, methane, and carbon dioxide .
他们创造的大气是由诸如氢、水、氨、甲烷和二氧化碳混合而成的气体。
The air seemed thin as though its combination of gases had little oxygen left
空气似乎很稀薄，好像在混合的气体中剩下的氧气很少。
The compositions of products from alkylation of m / o - cresols were analyzed by combination of gas chromatography and mass spectrometry ( gc - ms ) . the analysis method for such compositions was established
1电石深加工行业的现状和发展思路电石生产已有近百年历史,发达国家已转向利用石油、天然气资源替代电石生产化工产品.中国缺油多煤的国情,使电石生产仍然保持快速发展势头