With a lifespan of 30 years, their peculiar traits have evolved over millions of years to make them uniquely suited to survive harsh conditions, especially long periods without oxygen.

30 年的生命周期中，它们特别的特征长达百万年的时间中不断进化，使得他们以独特的方式适应恶劣的环境，特别是长期缺氧的环境。

Acute oxygen shortages are being reported from all over the country.

全国各地都有严重缺氧的报告。

So, the lack of oxygen killed my optic nerve.

所以，缺氧杀死了我的视神经。

The oxygen shortage in numerous Indian hospitals has prompted several nations to offer assistance.

印度多家医院的缺氧促使各国纷纷施以援手。

HbH molecules cause hypoxia in two ways.

HbH分子引起缺氧的机制有两种。

C. botulinum thrives in low-oxygen environments, and the ten to thirty cases reported each year in the U.S. are usually the result of eating improperly canned food, since canning removes oxygen from food to preserve it.

肉毒杆菌缺氧的环境中也能旺盛生长国每年有 10-30 例，食用未正确灭菌的罐头而致中毒，因为罐装是通过去除空气保存食物。

And since they took their lungs with them into the water, they could breathe oxygen-rich air, rather than being stuck with oxygen-poor water, allowing these mammals to grow almost twice as big as the biggest fish.

由于它们把肺带入水中，因此可以呼吸富含氧气的空气，而不是困缺氧的水中，这使得这些哺乳动物能够长到比最大的鱼几乎大一倍的个头。

Finally, after an interval that, for all involved, feels like being held underwater with no possibility of breathing, the man in the white shirt starts slowly leafing through the papers in his arms.

过了一阵子，所有场的人都缺氧的水面下快要憋不住气的时候，穿白衬衫的男人终于开始翻阅起手上的文件。

Oxygen does play a crucial role in one of the last steps of cellular respiration, but luckily our bodies have alternative pathways that help us survive when we temporarily lack oxygen.

氧气确实细胞呼吸的最后一个步骤中起着重要的作用，但幸运的是我们的身体内存着交替途径，可以帮助我们临时缺氧的情况下活下。

But this work may not be enough. Scientists are warning that there will be a 3 kilometer area of no oxygen in the Chesapeake Bay this year.

但这项工作可能还不够。科学家警告说，切萨皮克湾今年将有3公里的区域缺氧。

" Because the water is so cold, it can absorb more oxygen, so species are not limited by lack of oxygen in the water and can grow to gigantic sizes."

“因为水很冷，它可以吸收更多的氧气，所以物种不受水中缺氧的限制，可以长成巨大的体型。”

The most common places for such clots to develop are in the deep veins of the legs and in the vessels that carry de-oxygenated blood through the lungs.

形成血块最常见的部位腿部的深静脉和肺部运送缺氧血的血管中。

That lower layer bubbles up from deep within the Earth, and in addition to being smelly, it's anoxic -- there's no dissolved oxygen to power microbial metabolisms.

下层的咸水是从地球深处冒出的，除了气味难闻还缺氧，没有溶解的氧气可促使微生物进行代谢。

Oxygen deprivation experienced in some extreme sports can also be used as a stressor to push the brain's limits and to understand how its defense mechanisms work.

一些极限运动中经历的缺氧也可以作为压力源推动大脑的极限，并了解它的防御机制是如何工作的。

BOLT is not checking how long you can hold your breath, but how quickly your body reacts to a lack of air.

BOLT 不是用检查憋气时长的，而是用测试身体产生缺氧反应的快慢程度。

When the pressure within these compartments rises, normal blood flow can be cut off, leading to tissue damage due to hypoxia or the lack of oxygen.

当腔隙内的压力升高时，正常血流被阻断，会导致缺氧引起的组织损坏。

This results in cyanosis in the lower extremities, a blue or purple discoloration of the skin; that's the result of deoxygenated blood mixing with oxygenated blood.

这会导致下肢的发绀，即皮肤变蓝或青紫，是由缺氧血和氧合血混合造成的。

But even that fact could be dangerously misleading because it doesn't include deaths like Emmy's, which occur after drowning due to oxygen deprivation.

但即便如此，这个事实也可能非常具有误导性，因为它不包括像埃米这样溺水后因缺氧而死的人。

That makes the environment on the enamel surface favorable for facultative anaerobic bacteria, which can metabolize sugars with and without oxygen present.

这使牙釉质表面的环境有利于兼性厌氧菌生存；兼性厌氧菌即使缺氧的情况下也可以代谢糖类。

In a sewer's anaerobic conditions, common sulfate compounds are reduced by bacteria to hydrogen sulfide—the source of that rotten egg smell.

下水道缺氧的情况下，细菌会将常见硫酸化合物分解，使其转化为硫化氢——这便是臭鸡蛋气味的源。