英文书摘精选 Can Oxygen Be Toxic?氧气有毒吗?
时间：2018-12-28 作者：英语课 分类：初学者听力文摘精选
Can Oxygen Be Toxic 1?氧气有毒吗？
In order for us to live we must have oxygen, so how can it be bad for us? Today we explain how oxygen can be toxic.
氧气是我们生存所必需的，所以它怎么会对我们有害呢？今天我们来解释为什么说氧气有毒。
Toxic? Really?
有毒？真的？
Unbeknown to most people, too much oxygen can be toxic. After several days of breathing nothing but pure oxygen, you’d begin to experience nausea 2, dizziness, muscle twitches 3, and convulsions. You might even die.
多数人都不知道，过多的氧气是有毒的。只呼吸纯氧几天之后，你会觉得恶心，头昏眼花，肌肉痉挛，抽搐。甚至你可能会死亡。
Ironically, too much oxygen actually inhibits 4 ventilation and ends up slowing down the delivery of oxygen to your body’s tissues. Another problem is that certain tissues, like the lining 5 of the lungs and the walls of the arteries 6, are very sensitive to oxygen. The cornea is also very sensitive to oxygen; you may have heard of people who have gone blind because, as newborns, the oxygen levels in their incubators were too high.
讽刺的是，过多的氧气实际上会阻止空气流通，最终会减慢氧气在身体组织中的输送速度。另一个问题是，特定的组织，例如肺粘膜，动脉壁都对氧气很敏感。眼角膜也对氧气很敏感，你或许听说过有人在婴儿时期因为恒温箱中的氧气量过高而失明的事情。
Oxygen Molecules 8
氧气分子
Scientists aren’t really sure why oxygen affects the body this way. Some think it has to do with a special form of the oxygen molecule 7 which bonds with the proteins and membranes 9 in the lining of the lungs, and ends up destroying them. In other words, with too much oxygen around, your insides begin to oxidize.
科学家们不是很确定为什么氧气会这样影响身体。一些认为氧气分子以特殊的形式与肺粘膜上的蛋白质和细胞膜结合，最终破坏它们。换句话说，周围的氧气过多，身体内部会开始氧化。
- The factory had accidentally released a quantity of toxic waste into the sea.这家工厂意外泄漏大量有毒废物到海中。
- There is a risk that toxic chemicals might be blasted into the atmosphere.爆炸后有毒化学物质可能会进入大气层。
- Early pregnancy is often accompanied by nausea.怀孕期常有恶心的现象。
- He experienced nausea after eating octopus.吃了章鱼后他感到恶心。
- No response, just a flutter of flanks and a few ear twitches. 没反应，只有胁腹和耳朵动了几下。 来自互联网
- BCEF(50,100 mg·kg~-1 ) could distinctly increase the head-twitch number in the 5-HTP induced head-twitches test. BCEF50、100mg·kg-1可明显增加5羟色胺酸诱导甩头小鼠的甩头次数。 来自互联网
- A small manufacturing sector inhibits growth in the economy. 制造业规模太小有碍经济增长。
- His bad English inhibits him from speaking freely. 他英语学得不好，这使他不能表达自如。
- The lining of my coat is torn.我的外套衬里破了。
- Moss makes an attractive lining to wire baskets.用苔藓垫在铁丝篮里很漂亮。
- Even grafting new blood vessels in place of the diseased coronary arteries has been tried. 甚至移植新血管代替不健康的冠状动脉的方法都已经试过。 来自《简明英汉词典》
- This is the place where the three main arteries of West London traffic met. 这就是伦敦西部三条主要交通干线的交汇处。 来自《简明英汉词典》
- A molecule of water is made up of two atoms of hygrogen and one atom of oxygen.一个水分子是由P妈̬f婘̬ 妈̬成的。
- This gives us the structural formula of the molecule.这种方式给出了分子的结构式。