They said that their experiments showed that raising or lowering oxygen and carbon dioxide levels in the blood did not produce that reaction.

研究人员称，实验表明，提高或降低血液中氧气和二氧化碳的含量不会导致那种反应。

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Burning fossil fuels uses oxygen and produces carbon dioxide.

燃烧化石燃料消耗氧气并产生二氧化碳。

《柯林斯英汉双解大词典》

Humans take in oxygen and breathe out carbon dioxide.

人吸入氧气，呼出二氧化碳。

《牛津词典》

Doctors say that over time the damage interferes with the natural exchange of oxygen and carbon dioxide in the lungs.

VOA: special.2010.06.23

Doctors say the damage brought on by these conditions eventually interrupts the natural exchange of oxygen and carbon dioxide in the lungs.

VOA: standard.2010.06.21

These plastics not only serve as superior barriers to the flow of oxygen and carbon dioxide, keeping all kinds of products fresher longer, but also block out smells and prevent the packaging from absorbing any of the flavor or vitamin content of the food.

FORBES: Safer And Guilt-Free Nano Foods

It is based on indirect calorimetry, which determines energy expenditure of a person by measuring both consumed oxygen and produced carbon dioxide rates.

FORBES: Calories�Cthe ubiquitous term in health and fitness.

Monday's reported launch of the monkey -- who was kept in a "completely sealed" capsule that produces oxygen and absorbs carbon dioxide, with his vital signs recorded throughout the flight -- is part of a larger effort to someday send humans into space, said Iranian Space Agency Director Hamid Fazeli.

CNN: Reports: Monkey soars from Iran into space -- and back