Things like free diving, you know, a single breath, no oxygen.

像自由潜水这种缺活动。

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

全国各地都有严重缺报告。

HbH molecules cause hypoxia in two ways.

HbH分子引起缺机制有两种。

In response to a real oxygen emergency, naked mole rats enter a state of suspended animation.

如果真遇到了紧急缺况，裸鼹鼠就会进入停滞运动状态。

Only a few types of fish can survive in these oxygen-poor aquatic environments for more than a few weeks.

只有几种鱼能在这种缺水生环境中存活几周时间。

Blood flow is cut off to the cardiac muscle and the oxygen-starved cells start to die within several minutes.

通往心肌血流被阻断在几分钟内缺细开始死亡。

These sediments were anoxic, or poor in oxygen, and they were also full of hydrogen sulfide.

这些沉积物是缺或含量很低，并且它们充满了硫。

On earth bacteria thriving in oxygen starved environments like sewers and intestines produce the gas phosphine.

在地球上，细菌生长在缺环境中，如下水道和肠道，产生气体磷。

It is why people with lower oxygen concentration sometimes remove protective clothes atop Mount Everest; some freeze to death.

这就是为什么缺人有时会在珠穆朗玛峰顶上脱下防护服；其中一些人甚至会因此冻死。

In 2012, American Joe Pratt struggled with the lack of oxygen at such a high elevation, though he survived.

而在2012年, 美国人乔·普拉特就是挑战这样一种高海拔缺艰难困境, 但活了下来。

A hypoxic ocean can also cool the climate.

缺海洋也会使气候变凉。

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

印度多家医院缺促使各国纷纷施以援手。

So, the lack of oxygen killed my optic nerve.

所以，缺杀死了我视神。

Inhale a smaller dose, though, and you will merely become mildly oxygen-deprived.

然而，吸入较小剂量，你只会出现轻度缺况。

It noted that some had blue skin – evidence of a lack of oxygen.

它指出，有些人皮肤是蓝色——这是缺证据。

External gills help it to breathe in water that is particularly low in oxygen.

外生鳃帮助它们 在极度缺水中呼吸。

That's one of the reasons smoking can lead to oxygen deprivation and shortness of breath.

这就是吸烟可导致缺和呼吸急促原因之一。

It remains unclear how the animal survives the oxygen scarcity and freezing temperatures at this elevation.

目前还不清楚这种动物是如何在高海拔缺和寒冷温度下生存下来。

Puncture wounds are usually anaerobic and warm, and are therefore optimal for growth of Clostridium tetani.

刺伤通常产生缺且温暖伤口环境，也成为了破伤风梭菌最佳培养基。

So, a cooler climate and an oxygen-poor ocean could certainly have been behind the major extinction of ocean life.

因此，较冷气候和缺海洋肯定是海洋生物大灭绝原因。