The modern atmosphere supports many forms of complex life that would not have been able to exist in Earth's first atmosphere because the oxygen level was too low.
现代大气层支持着许多复杂的生命形式，而这些生命在地球最初的大气层中是不可能存在的，因为当时的氧气含量太低。
People with trouble sleeping can use this app to record their blood-oxygen level during the night — data that can help a doctor diagnose whether they have sleep apnea.
有睡眠障碍的人可在晚间使用该应用记录他们的血氧饱和度——该数据可帮助医生诊断他们是否患有睡眠呼吸暂停症。
Use the VTI oxygen Analyzer for "spot checks" in instances when an oxygen level alarm is not necessary.
不需要含氧量警报时，使用VTI氧气分析器进行抽查。
The proven VTI Oxygen Monitor is the system you want working for you when oxygen level alarms are needed.
已经证实的VTI氧气监测仪是需要含氧量警报时的理想产品。
In the process of glutamic acid fermentation, dissolved oxygen level was one of the most important factors.
在谷氨酸发酵过程中，溶氧水平是影响发酵的重要因素之一。
In fact, many experts believed that the oxygen level was only about two percent of the atmosphere so long ago.
事实上，很多专家认为那么久远之前的氧含量大约只占到大气的2%。
The arterial oxygen level and liver function were measured by automatic blood gas analyzer and automatic biochemistry analyzer.
分别用自动血气分析仪检测动脉血氧水平和自动生化分析仪检测受试对象肝功能状态。
Conclusion Ginkgo biloba extracts is a promising therapy for POCD and the potent mechanism is improved blood oxygen level in the brain.
结论：银杏提取物是一种有应用前景的预防术后认知障碍的药物，其机制可能与改善脑组织血氧水平有关。
Plus, caving can be a very healthy sport, for the oxygen level is usually higher so basically you are having an oxygen spa as the bonus.
此外，洞穴探险也是项十分健康的运动，因为那里通常氧气含量较高，所以基本上你还可以额外享受一次氧气spa。
Objective To assess the value of blood oxygen level-dependent magnetic resonance imaging (BOLD-MRI) in diagnosis and prediction of early acute renal transplant rejection.
目的探讨血氧水平依赖的功能磁共振成像（BOLD-MRI）在早期移植肾排异中的诊断和预测作用。
As soon as the blood oxygen level drops the carotid chemoreceptors get stimulated, which then reports to the brain and is followed by a massive increase in sympathetic nerve activity.
血氧水平下降，颈动脉化学感受器就会感受到刺激，向大脑汇报低氧信息，之后交感神经活性就会大大增高。
As soon as the blood oxygen level drops the carotid chemoreceptors get stimulated, which then reports to the brain and is followed by a massive increase in sympathetic nerve activity.
血氧水平下降，颈动脉化学感受器就会感受到刺激，向大脑汇报低氧信息，之后交感神经活性就会大大增高。
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