Essentially, they created equal concentrations of carbon dioxide in their lungs and in their bloodstreams.

总的来说，他们在肺部和血液中产生了相等浓度的二氧化碳。

The U.N. agency says that concentrations of carbon dioxide are 50 percent higher than before the Industrial Revolution.

该联合国机构称CO2浓度比工业革命之前高了50%。

Ahead of schedule, the concentration of carbon dioxide gas in the Earth's atmosphere has reached 400 parts per million.

比预期超前，地球大气中二氧化碳的浓度达到了 400/100万。

This measures the amount of warming that can eventually be expected to follow a doubling in the atmospheric concentration of carbon dioxide.

该指标表示预计大气中二氧化碳浓度翻倍所能引致的升温量。

The tiny blood vessels around our lungs called capillaries have a higher concentration of carbon dioxide than in the air in our lungs.

肺周围称为毛细血管的微小血管中的二氧化碳浓度高于肺中气体中的二氧化碳浓度。

The concentration of carbon dioxide in the earth's atmosphere has increased by 40 percent just in the last 150 years or so.

仅在过去150年左右的时间里，地球大气中的二氧化碳浓度就增加了40%。

While this reaction is reversible, as indicated by the double arrows, the high concentration of carbon dioxide pushes the reaction to the right.

虽然这种反应是可逆的，如双箭头所示，但高浓度的二氧化碳将反应推向右侧。

Humans have boosted the concentration of carbon dioxide in the atmosphere by about half in the past 250 years, to its highest level in around 3m years.

在过去的250年里，人类使大气中的二氧化碳浓度增加了大约一半，达到了300万年来的最高水平。

The reaction you see below is pulled to the left because the concentration of carbon dioxide in the lungs is decreased as we breathe it off.

您在下面看到的反应向左拉，因为随着我们的呼吸，肺中二氧化碳的浓度降低。

Breathing is regulated unconsciously by center in the brainstem. These centers adjust the rate and rhythm of breathing according to changes in the composition of the blood, especially the concentration of carbon dioxide.

呼吸受到脑干中心无意识的调节。这些中心根据血液成分的变化，特别是二氧化碳的浓度来调节呼吸的速度和节律。