但氧气不足的时候，身体会暂时将丙酮酸转换成为乳酸，使得葡萄糖能够继续分解，以便产生能量。
When the body has plenty of oxygen, pyruvate is shuttled to anaerobic pathway to be further broken down for more energy.
在这种情况下，只有在几次呼吸不足出现，导致血液中二氧化碳大量增加和氧气减少后，呼吸的力度才得到调整。
Only after several inadequate breaths under such conditions, resulting in the considerable elevation of carbon dioxide and reduction of oxygen in the blood, is breathing effort adjusted.
很长一段时间，人们都相信打哈欠是因为血液里二氧化碳太多而氧气不足，大脑茎干觉察到这点于是触动了打哈欠的神经。
It was long believed you yawned when there was too much carbon dioxide and not enough oxygen in your blood. A part of your brain called the brain stem detected this and triggered the yawn reflex.
木材高温加热，有限的氧气不足以使它完全燃烧，于是产生气体，可以作为发动机或内燃机的能源。
Wood heated at high temperatures with minimal oxygen cannot burn completely. Instead, it creates gases that can be used to power generators or internal combustion engines.
他的任务是找到失踪的核弹头并拆除上面的引信（反映了技术之危险），虽然后来任务完成，潜水衣中的氧气却不足以支撑他重新返回钻台了（反映了技术之不足）。
He needs to disarm a lost nuclear warhead (technology as danger), and while he is successful, he does not have enough oxygen left in his suit to return to Deep Core (technology as inadequate).
信拉皮迪：下一个大的担心是空气中的氧气不足。
FAITH LAPIDUS: the next big worry is the lack of oxygen in the air.
大脑比人体的任何其他器官都更需要氧气。如果大脑供氧不足，会导致产生负面思想，消极情绪，甚至视力和听力下降的后果。 。
Thee brain requires more oxygen than any other organ. If it doesn't get enough, the result is negative thoughts, depression and eventually, vision and hearing decline.
他们也说，人民需要的氧气不足时，心脏是在休息。
They also say people need less oxygen when the heart is at rest.
研究表明，这会妨碍胎儿获得发育所需要的氧气和营养物质，这可能对胎儿造成伤害，引起早产或胎儿体重不足。
Research shows that this will prevent embryos from getting oxygen and nutrient substance which are necessary for life.
导致呼吸困难的因素，并不是每次呼吸氧气不足，而是因为机体变热需要更多的氧气冷却自己。
Breathing more likely becomes labored not because of a lack of oxygen with each breath, but because the body is running hotter and needs more oxygen to cool itself.
在高空，空气含氧不足，无法供应身体需要。由于水下不能呼吸，潜水员也携带额外的氧气。
The air at high altitudes does not have enough oxygen to supply the body's needs. Divers also carry extra oxygen because they cannot breathe under water.
孔雀鱼需要氧气才能存活，所以当我们看到它们无力的浮游在水面上换气时，这就是一种警讯并代表饲养缸里的水中含氧量不足。
Fish need oxygen to survive. If your guppies are gasping at the water's surface, this is a sign that there is not enough oxygen in the tank for the number of fish you have.
铁的短缺可以非常迅速导致低血红蛋白含量的红血细胞，这反过来又会造成赋予生命的氧气以组织的供应不足。
A shortage of iron can very quickly lead to a low haemoglobin content of red blood cells, which in turn then supply less life-giving oxygen to the tissues.
铁的短缺可以非常迅速导致低血红蛋白含量的红血细胞，这反过来又会造成赋予生命的氧气以组织的供应不足。
A shortage of iron can very quickly lead to a low haemoglobin content of red blood cells, which in turn then supply less life-giving oxygen to the tissues.
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