1·The oxygen poor air at great heights causes a person's heart to work extra hard.
高山的缺氧常常会引起人们工作额外的辛苦。
2·Air cannot penetrate between the soil particles, making the soil oxygen-poor.
空气不能穿透土壤颗粒，这使得土壤中缺少氧气。
3·When you mind is dull - concentration and clarity is poor. Alternate nostril breathing brings equal amounts of oxygen to both sides of the brain for improved brain function.
当你感到迷糊犯困、注意力分散、思维混乱之时，交替鼻孔呼吸能够为你的左右大脑提供等量的氧气并提高大脑活力。
4·Massive releases of methane from arctic seafloors could create oxygen-poor dead zones, acidify the seas and disrupt ecosystems in broad parts of the northern oceans, new preliminary analyses suggest.
新近研究的初步分析表明，从北极海床释放的大量甲烷可能造成缺氧死区，海洋酸化并扰乱北部海洋广大地区的生态系统。
5·First, they considered the possibility that seasonal upwellings of toxic or oxygen-poor bottom water were responsible.
首先，他们考虑了有毒的或者无氧的底部水流的季节性上升造成这种灾难的可能性。
6·Poor blood oxygen levels and blood vessel blockages in people with sickle-cell disease can lead to chronic acute pain syndromes, severe bacterial infections, and necrosis (tissue death).
镰状细胞病患者血液含氧量低并且发生血管堵塞，可导致出现慢性和急性疼痛综合症、重度细菌感染和坏疽(组织坏死)。
7·The bacteria colony has been isolated there for about 1.5 million years, researchers say, ever since the glacier rolled over the lake and created a cold, dark, oxygen-poor ecosystem.
研究人员称，自从冰川从湖中诞生，创造了这样寒冷，黑暗，无氧的生态环境时起，这种细菌菌落已被隔离了约150万多年。
8·As a result, the researchers' model suggests, the waters down-current of a large methane plume, especially in an ocean basin with poor circulation, could lose as much as 95 percent of their oxygen.
研究人员的模型显示，这一结果导致大量不断释放的甲烷随流而下，使得尤其是在循环不畅的海洋盆地，水中氧气损失可能会高达95%。
9·Overall, however, clinical signs are poor predictors of hypoxaemia, and using pulse oximetry in resource-poor health facilities to target oxygen therapy is likely to save costs.
总之，临床症状不能很好地预示低血氧症，在资源匮乏的医疗机构进行脉搏血氧测量并借此判断是否采取吸氧疗法可以节省成本。
10·Serious leg and foot infections, even gangrene and amputation, are due to poor blood circulation, lack of oxygen and nutrients to tissue, and nerve damage.
严重的腿部和脚步感染，甚至坏疽和截肢，这都是由于血液循环不良，肌肉缺少氧气和营养，神经损伤导致的。