新鲜气体可视作仅以气泡形式进入床层。
We view fresh gas entering the bed only in the form of gas bubbles.
用听诊法和荧光检查法确定导管位置，以5L流量新鲜气体，用预设容积的定压式呼吸机行机械通气。
On a preset volume-pressure-limit ventilator with 5L fresh gas flow, the children were mechanically ventilated.
一旦在街上，他们将在新鲜空气和有毒气体取代它。
Once out on the streets, they will take in fresh air and replace it with poisonous gases.
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