Because they lack oxygen, marsh sediments are high in sulfides that are toxic to most plants.
由于它们缺乏氧气，沼泽沉积物中的硫化物含量很高，而硫化物对大多数植物都有毒。
The absence of oxygen on other planets means that those planets lack an ozone shield to protect life forms against UV radiation.
其他行星上没有氧气，这意味着这些行星缺乏保护生命体免受紫外线辐射的臭氧层。
The majority of people who die in fires don’t die from burns, but rather they suffocate due to the lack of oxygen and inhale toxic gases such as carbon monoxide, carbon dioxide and hydrogen cyanide.
火灾中大部分人不是被烧死的，而是因缺少氧气窒息而死或是吸入如一氧化碳、二氧化碳、氯化氢等有毒气体而被毒死的。
The majority of people who die in fires don't die from burns, but rather they suffocate due to the lack of oxygen and inhale toxic gases such as carbon monoxide, carbon dioxide and hydrogen cyanide.
火灾中大部分人不是被烧死的，而是因缺少氧气窒息而死或是吸入如一氧化碳、二氧化碳、氯化氢等有毒气体而被毒死的。
Many climbers leave their gear and trash behind as they descend due to exhaustion and lack of oxygen.
很多登山者由于体力不支和缺氧，在下山途中就将一些器具和垃圾丢在了山上。
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。
Interestingly, the bodies of the crew appeared to be at their stations as if nothing had happened, and studies show they died of lack of oxygen rather than drowning.
有趣的是船员的尸体似乎还在他们的岗位上，像什么都没发生过一样。研究表明他们死于缺氧的可能性大于溺死。
Because of the lack of oxygen getting to the cells, the cells are no longer able to carry on their various metabolic processes.
由于细胞中缺少氧气，所以细胞不能完成，它们的各种新陈代谢活动。
Experts said the fish may have died from lack of oxygen due to algae, while locals wondered if high winds overnight might have something to do with it.
专家称这些鱼可能是因为海藻侵袭，导致缺氧死亡，也有专家称是因为连夜暴风雨所致。
Many climbers leave their gear and trash behind as they descend due to exhaustion and lack of oxygen。
很多登山者由于体力不支和缺氧，在下山途中就将一些器具和垃圾丢在了山上。
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。
The horrified victims have little chance to even realize what is happening before they are engulfed and lose consciousness from lack of oxygen.
极度恐惧的受害者甚至还没有意识到发生了什么事情，就被火暴吞没，缺乏氧气而失去了知觉。
Persons suffering from lack of oxygen should be moved to areas with normal atmosphere.
应当马上把缺氧的人转移到有正常空气的区域。
If the flow of blood isn't restored quickly, the section of heart muscle becomes damaged from lack of oxygen and begins to die.
如果流动的血液不能很快恢复，这部分的心脏肌肉损坏并且缺乏氧气人就会开始死亡。
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。
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。
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。
Bleeding can cause foetal hypoxia (lack of oxygen to the brain of an unborn child).
出血会导致胎儿脑缺氧。
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。
Some of these problems, similar to those of living in outer space, are pressure, Lack of oxygen and weightlessness.
其中有些问题，与在外层空间生活时所遇到的一样，是压力。缺氧和失重现象。
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。
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。
In addition, the labor time is short which help to reduce harm to the mother and baby lack of oxygen.
此外，水中分娩的时间较短，能减少对母亲的伤害和婴儿缺氧的危险。
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。
Already scientists have begun to study the problems of living in outer space; pressure, lack of oxygen, in outer space: pressure, lack of oxygen, and weightlessness.
科学家们已经开始研究在外层空间的生活问题：如压力，无氧以及失重。
Objective: to explore the reason of the increase of fetal monitoring fetal heart rate baseline thin variability and fetal intrauterine stockpiling ability and lack of oxygen.
目的：探讨胎儿监护胎心基线细变异增加的原因、胎儿宫内储备能力及缺氧情况。
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；
Symptoms before: lack of oxygen to the brain and muscle tissues caused inability to concentrate, muscle weakness, emotional irritability.
以前的症状：大脑和和肌肉组织缺氧导致注意力不集中，肌肉无力，脾气暴躁。
Symptoms before: lack of oxygen to the brain and muscle tissues caused inability to concentrate, muscle weakness, emotional irritability.
以前的症状：大脑和和肌肉组织缺氧导致注意力不集中，肌肉无力，脾气暴躁。
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