lowadj.低的；少的；低落的；低声的；卑劣的；低等的adv.低地；低声地；低下地；廉价地n.低水平；低价；低谷v.哞哞叫low tv band[电] 电视低频段

1. Degression of the oxygen pressure in vigour analysis should help to find SARS cases or define serious cases.
   血气分析氧分压降低有助于非典型肺炎的发现与重症病例的确定。
2. Oxygen plays a key role in metabolism, but can also be an unhealthful agent.
   氧分在新陈代谢方面起着关键作用，但也是引起不健康的因素。