Making matters worse, a lack of oxygen often then triggers VEGF's production cycle.
更糟糕的是，VEGF的过度产生往往会陷入缺氧引起的恶性循环中。
"We don't know if tissue dies because of a lack of oxygen or when oxygen levels are restored," says Whitesides.
我们不清楚是否组织因为缺氧而死，或是在含氧量恢复时死掉。
A lack of oxygen around the time of birth (perinatal asphyxia) can cause death and long-term illness in newborn infants.
新生儿在出生时缺氧(周产期窒息)，可能导致死亡和长期的疾病。
Mr. Baributsa says the storage bags are thick enough that any insects already in the cowpeas will die from a lack of oxygen.
Baributsa表示这种储藏袋足够厚，豇豆中的任何昆虫都将会死于缺氧。
The condition, which causes a newborn's skin to turn blue from a lack of oxygen in the blood, arises without any hereditary explanation 70 percent of the time;
这种症状，是由于血液中缺氧而导致的新生儿皮肤青紫。70%的例子不能用遗传来解释；
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.
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。
Experts say people should know about other health concerns that can strike when traveling by air. One of these is hypoxia. It results from a lack of oxygen to the brain.
专家们说人们应该了解在乘飞机旅行时其他能够侵袭身体健康的问题，其中一个是组织缺氧，它是由大脑缺氧造成。
A dangerous tourist spot, the mountain has claimed many adventurers' lives-from falls, lack of oxygen, exposure, and other deadly pitfalls.
这是一个危险的旅行地点，珠峰夺去了许多探险者的生命-坠落、缺氧、暴露、和其他致命的隐患。
Anemia can lead to a rapid or irregular heartbeat - an arrhythmia.Your heart must pump more blood to compensate for the lack of oxygen in the blood when you're anemic.
贫血会导致心律失常——这是因为贫血时血液的供氧能力下降，作为代偿心脏不得不燃烧小宇宙，在单位时间内泵出更多的血，从而使心跳变快，或不规则。
Anemia can lead to a rapid or irregular heartbeat - an arrhythmia. Your heart must pump more blood to compensate for the lack of oxygen in the blood when you're anemic.
贫血会导致心律失常——这是因为贫血时血液的供氧能力下降，作为代偿心脏不得不燃烧小宇宙，在单位时间内泵出更多的血，从而使心跳变快，或不规则。
Others have proposed lack of oxygen or hallucinogenic drugs as a trigger.
有其他专家认为缺氧和服用致幻药物可能是诱因。
Lack of oxygen is a factor in the development of necrotizing enterocolitis (nec), a kind of gangrene of the intestine that can be fatal in premature babies.
缺氧是坏死性小肠结肠炎(necrotizing enterocolitis,nec)，一种对发育未成熟的新生儿来说致命的坏疽，发病的重要因素之一。
After a day of the burial, the little girl's face due to excessive hunger and the lack of oxygen, the original Hongrun Xiaolian has become a black and yellow of the yellow.
经过了一天的掩埋，小女孩的脸由于过度饥饿和缺氧，原本红润的小脸已经变成了黑黄黑黄了。
The pathological condition underlying cerebrovascular accident is a lack of blood and oxygen to the brain cells.
造成中风的病理情况，是脑细胞缺乏血液和氧气供应。
The result shows that black rice pigment has a clear tendency to enhance the ability to resist fatigue and bear the lack of oxygen of animal baby.
结果表明：黑米色素对提高动物肌体的抗疲劳能力与抗缺氧能力的趋势是明显的。
Any of a number of elements, such as oxygen or sulfur, that lack the physical and chemical properties of metals.
一种元素，如氧或硫，其没有金属的物理和化学性质。
In addition, children with mouth breathing, long nose stuffy, easy cause head ischemia, lack of oxygen, appear listlessness, headache, dizziness, memory loss, slow to respond to wait for a phenomenon.
另外，患儿长期用口呼吸、鼻子不通气，易造成头部缺血、缺氧，出现精神萎靡、头痛、头晕、记忆力下降、反应迟钝等现象。
With ground beef, it can have a bright red colour on the surface, but the interior of the meat may be grayish-brown due to the lack of oxygen penetrating below the surface.
对于切碎后的牛肉，表面的颜色为明亮的红色，里面的可能为灰棕色，因为氧气无法到达碎肉里部。
If you're in a real free fall, hypoxia might set in and you'll be unconscious for roughly the first mile of the fall because of lack of oxygen.
如果你真正开始坠落，可能会出现缺氧，因为缺氧你会在刚下降一英里的时候失去意识。
Cats and dogs are rendered unconscious within a minute, then eventually die from lack of oxygen.
这时，密闭室里的小猫或小狗会在一分钟之内丧失知觉，并且会缺氧而死亡。
Cats and dogs are rendered unconscious within a minute, then eventually die from lack of oxygen.
这时，密闭室里的小猫或小狗会在一分钟之内丧失知觉，并且会缺氧而死亡。
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