As the severity of the obstruction to expiratory flow increases, patients become increasingly dyspneic.

随着呼气性阻塞越来越严重，病人的呼吸困难也逐渐加重。

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Objective to investigate the effect of maximal expiratory flow on the ventilatory response to exercise.

目的本文探讨了最大呼气量对运动通气反应的影响。

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The strain expiratory sensor is used to measure people's expiratory flow through strain-measuring bridge.

应变式呼气流量传感器利用应变电桥对人的呼气流量进行测量。

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But soon after, I developed a novel mathematical model which can be used by doctors and environmental specialists to quantify the effect of the pollutants on the lung function as measured by the peak expiratory flow rate-- which is essentially how much a person can breathe out in one breath.

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