(单词翻译:单击)
听力文本
The venom from an Australian funnel web spider can kill a person in about 15 minutes. It might also prevent brain damage after a stroke.
澳大利亚漏斗网蜘蛛的毒液可以在15分钟杀死一个人。但它也可能预防中风脑损伤。
Scientists noticed a molecule in the spider's venom looks a lot like another chemical known to protect brain cells.
科学家发现蜘蛛的毒液分子看起来很像另一种能保护脑细胞的化学物质。
So they did what scientists do,they tested the molecule on rats. The results were pretty impressive. The scientists found the chemical could help prevent some brain damage if administered as many as eight hours after a stroke.
所以他们做了科学家该干的事，他们在老鼠身上测试了该分子。结果是相当令人鼓舞的。科学家们发现，中风后处理八小时该化学物质能够预防部分脑损伤。
Most strokes occur from a blockage or narrowing of arteries in the brain, and that's the kind scientists looked at in this study.
大多数中风发生在大脑动脉堵塞或狭窄，科学家在对此进行研究。
They still need to test the chemical's effectiveness at treating strokes that result from ruptured blood vessels. And human trials probably won't start for another two years.
他们还需要测试该化学物质对处理血管破裂导致中风的有效性。未来两年可能不会进行人体试验。
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词汇解析
1、prevent
防止；预防；阻止
These methods prevent pregnancy.
这些方法能防止怀孕。
Further treatment will prevent cancer from developing.
进一步的治疗将阻止癌症恶化。
阻止；制止；阻碍
He said this would prevent companies from creating new jobs.
他说这将使公司无法创造新的工作机会。
Its nationals may be prevented from leaving the country.
其国民可能会被禁止出境。
2、occur
发生
If headaches only occur at night, lack of fresh air and oxygen is often the cause.
如果只是在晚上头疼，那常常是由于缺乏新鲜空气和氧气的缘故。
The crash occurred when the crew shut down the wrong engine.
机务人员关错了引擎，随即飞机坠毁。
存在；出现；有
The cattle disease occurs more or less anywhere in Africa where the fly occurs.
在非洲凡是有这种蝇虫的地方，几乎都会出现这一牛病。
These snails do not occur on low-lying coral islands or atolls.
在地势低平的珊瑚岛或环礁上没有这种螺。
（想法或主意）被想到，被想起，浮现于脑海中
It did not occur to me to check my insurance policy.
我没有想到要核实我的保险单条款。
It occurred to me that I could have the book sent to me.
我想到可以让人把书寄给我。
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