respiratory quotient

例句：

1. 1. The respiratory quotient of the sample is 0.85.
   样本的呼吸商是0.85。
2. 2.The respiratory quotient can be used to estimate the amount of oxygen in the blood.
   呼吸商可以用来估计血液中的氧气含量。
3. 3.The respiratory quotient is a measure of how much CO2 is being produced by the body.
   呼吸商是一个衡量身体产生多少二氧化碳的指标。