返回首页您现在的位置: 主页 > 英语资讯 > 英语新闻 > 文章内容

二手大麻烟雾一分钟即可损坏血管

来源: 英语作文网 时间: 2016-07-31 阅读:
Rats' blood vessels1 took at least three times longer to recover function after only a minute of breathing secondhand marijuana smoke, compared to recovery after a minute of breathing secondhand tobacco smoke, according to new research in Journal of the American Heart Association, the Open Access Journal of the American Heart Association/American Stroke Association. When rats inhaled3 secondhand marijuana smoke for one minute, their arteries4 carried blood less efficiently5 for at least 90 minutes, whereas similar exposure to secondhand tobacco smoke caused blood vessel2 impairment that recovered within 30 minutes.
 
"While the effect is temporary for both cigarette and marijuana smoke, these temporary problems can turn into long-term problems if exposures occur often enough and may increase the chances of developing hardened and clogged6 arteries," said Matthew Springer, Ph.D., study senior author and professor of medicine at the University of California, San Francisco's Division of Cardiology.
 
Blood vessel function was examined in rats before and after exposure to secondhand marijuana smoke at levels similar to real-world secondhand tobacco smoke.
 
"Arteries of rats and humans are similar in how they respond to secondhand tobacco smoke, so the response of rat arteries to secondhand marijuana smoke is likely to reflect how human arteries might respond," Springer said.
 
Researchers also found the mere7 burning of the plant material appears responsible for the impaired8 blood vessels, not chemicals like nicotine9 and tetrahydrocannabinol (THC), the psychoactive ingredient in marijuana, nor rolling paper.
 
"There is widespread belief that, unlike tobacco smoke, marijuana smoke is benign," Springer said. "We in public health have been telling the public to avoid secondhand tobacco smoke for years, but we don't tell them to avoid secondhand marijuana smoke, because until now we haven't had evidence that it can be harmful."



  
1 vessels     
n.血管( vessel的名词复数 );船;容器;(具有特殊品质或接受特殊品质的)人
参考例句:
  • The river is navigable by vessels of up to 90 tons. 90 吨以下的船只可以从这条河通过。 来自《简明英汉词典》
  • All modern vessels of any size are fitted with radar installations. 所有现代化船只都有雷达装置。 来自《现代汉英综合大词典》


  • 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 inhaled     
    v.吸入( inhale的过去式和过去分词 )
    参考例句:
  • She closed her eyes and inhaled deeply. 她合上双眼,深深吸了一口气。
  • Janet inhaled sharply when she saw him. 珍妮特看到他时猛地吸了口气。 来自《简明英汉词典》


  • 4 arteries     
    n.动脉( artery的名词复数 );干线,要道
    参考例句:
  • 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》


  • 5 efficiently     
    adv.高效率地,有能力地
    参考例句:
  • The worker oils the machine to operate it more efficiently.工人给机器上油以使机器运转更有效。
  • Local authorities have to learn to allocate resources efficiently.地方政府必须学会有效地分配资源。


  • 6 clogged     
    (使)阻碍( clog的过去式和过去分词 ); 淤滞
    参考例句:
  • The narrow streets were clogged with traffic. 狭窄的街道上交通堵塞。
  • The intake of gasoline was stopped by a clogged fuel line. 汽油的注入由于管道阻塞而停止了。


  • 7 mere     
    adj.纯粹的;仅仅,只不过
    参考例句:
  • That is a mere repetition of what you said before.那不过是重复了你以前讲的话。
  • It's a mere waste of time waiting any longer.再等下去纯粹是浪费时间。


  • 8 impaired     
    adj.受损的;出毛病的;有(身体或智力)缺陷的v.损害,削弱( impair的过去式和过去分词 )
    参考例句:
  • Much reading has impaired his vision. 大量读书损害了他的视力。 来自《现代汉英综合大词典》
  • His hearing is somewhat impaired. 他的听觉已受到一定程度的损害。 来自《现代汉英综合大词典》


  • 9 nicotine     
    n.(化)尼古丁,烟碱
    参考例句:
  • Many smokers who are chemically addicted to nicotine cannot cut down easily.许多有尼古丁瘾的抽烟人不容易把烟戒掉。
  • Many smokers who are chemically addicted to nicotine cannot cut down easily.许多有尼古丁瘾的抽烟人不容易把烟戒掉。



  • 上一篇:中东沙漠的吸热率影响印度洋季风强弱 下一篇:澳大利亚拒绝搬进里约奥运村 担心住所状况不佳

    相关阅读