SSS 2012-06-27_在线英语听力室_免费在线英语听力学习网站

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Every time you inhale¹, oxygen passes from your windpipe to your lungs and on into your bloodstream. But what if your windpipe was blocked? Getting the gas straight to your blood could save your life. Wait, put down that syringe—a large air bubble in a blood vessel² can kill you. But what if the bubbles were only a few millionths of a meter in diameter?

Researchers coated tiny amounts of oxygen gas with fatty molecules³ to create microparticles. Suspended in solution, the microparticles formed a foam⁴ containing 50 to 90 percent oxygen. In a beaker of blood, the foam was able to quickly transfer its oxygen to the cells.

Then the researchers tested it in animals. Normally, a blocked windpipe cuts off the blood’s supply of oxygen, leading to brain damage and death. But when rabbits with blocked windpipes received injections of the microparticles, their blood oxygen levels and heart rates remained stable. The work is in the journal Science Translational Medicine.

The foam may someday buy time for human patients. So that even someone with a closed airway⁵ can breathe easy.

Thanks for the minute for Scientific Americans 60 second Science, I am Sophie Bushwick.

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收听单词发音

1 inhale
v.吸入(气体等)，吸(烟)
参考例句：
Don't inhale dust into your lung.别把灰尘吸进肺里。 They are pleased to not inhale second hand smoke.他们很高兴他们再也不会吸到二手烟了。

2 vessel
n.船舶；容器，器皿；管，导管，血管
参考例句：
The vessel is fully loaded with cargo for Shanghai.这艘船满载货物驶往上海。 You should put the water into a vessel.你应该把水装入容器中。

3 molecules
分子( molecule的名词复数 )
参考例句：
The structure of molecules can be seen under an electron microscope. 分子的结构可在电子显微镜下观察到。 Inside the reactor the large molecules are cracked into smaller molecules. 在反应堆里，大分子裂变为小分子。

4 foam
v./n.泡沫，起泡沫
参考例句：
The glass of beer was mostly foam.这杯啤酒大部分是泡沫。 The surface of the water is full of foam.水面都是泡沫。

5 airway
n.空中航线，通风口
参考例句：
Lay them on their side and ensure the airway is unobstructed.让他们侧躺着，并确保呼吸道畅通。 There is a purple airway in London Airport.伦敦机场里有一条皇家专用飞机跑道。