Preoxygenation replaces the primarily nitrogenous mixture of ambient air, which constitutes the patient's functional residual capacity, with oxygen.

这样可以用氧气取代之前被氮气占据的肺泡。

The property that Activated Carbon Fiber (ACF) materials absorb sulfur dioxide in ambient air was studied by the Tetrachlorowercurate (TCM) pararosaniline method.

本文采用四氯汞盐溶液吸收--盐酸副玫瑰苯氨比色法研究了活性碳纤维材料(ACF)对微量二氧化硫等气体的吸附性能。