因此，二氧化碳监测仪提供了一种连续的非侵袭性的反应动脉血二氧化碳分压的方法，二氧化碳分压直接由肺泡通气决定。
Hence capnometry offers a continuous, non-invasive way to reflect the partial pressure of carbon dioxide in arterial blood, which is directly determined by alveolar ventilation.
中国连续遭遇雾霾侵袭，口罩和空气净化器成了热销产品。如今，又一种新产品引起了公众的注意：瓶装空气。
China's smog has made masks and air purifiers the hottest of commodities. Now, a new product is getting all the attention: bottled air.
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