对于主流型二氧化碳分析仪，位于通气接头的测量盒可能会变脏或被损坏，导致错误的或吸入二氧化碳值。
With mainstream capnographs, the measuring chamber in the airway adaptor can become dirty or damaged, leading to erroneous end-tidal or inspired carbon dioxide values.
碳的同位素分析与其他的研究结果告诉我们，大气中的二氧化碳大部分来源于工业生产的排放。
Analysis of carbon isotopes, among other things, shows that the carbon dioxide from industry accounts for most of the build-up in the atmosphere.
为了测算出远古时候的二氧化碳、温度、降雨量和其他一些参数，研究人员正在分析早期和晚期煤炭矿床中的化学成分。
The researchers are analyzing the chemical makeup of earlier and later coal deposits for measures of ancient carbon dioxide, temperature, rainfall and other variables.
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