气体含量是指在单位体积内，特定气体的含量。一般以 摩尔每体积为单位。
她厨房的甲醛气体含量是联邦为化工工人设立的最大值标准的两倍。
The level of formaldehyde gas in her kitchen was twice the maximum allowed by federal standards for chemical workers.
问题是，气体含量的增加不是突然出现的，因此没有清晰可辨的边界层。
The problem is that since the increase in the gas content did not occur abruptly, there is no clearly discernible boundary layer.
土壤的主要特性有质地、酸度、养分含量、气体含量和含水量。
The major characteristics of soils are texture, acidity, nutrient content, gaseous content, and moisture content.
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