One effect of this lack of oxygen to the brain is a headache.

VOA: special.2009.07.14

Because of the lack of oxygen getting to the cells, the cells are no longer able to carry on their various metabolic processes.

由于细胞中缺少氧气,所以细胞不能完成,它们的各种新陈代谢活动

耶鲁公开课 - 死亡课程节选

The first is the lack of oxygen in the extremely thin air.

VOA: special.2010.06.30

It results from a lack of oxygen to the brain.

VOA: special.2009.07.14

"This will wedge itself in so tightly and completely block the airway that within minutes, because of lack of oxygen, a child will die."

VOA: standard.2010.02.23