英语 英语 日语 日语 韩语 韩语 法语 法语 德语 德语 西班牙语 西班牙语 意大利语 意大利语 阿拉伯语 阿拉伯语 葡萄牙语 葡萄牙语 越南语 越南语 俄语 俄语 芬兰语 芬兰语 泰语 泰语 泰语 丹麦语 泰语 对外汉语

科学美国人60秒 SSS 2014-07-15

时间:2014-08-12 07:20来源:互联网 提供网友:gmeng   字体: [ ]
特别声明:本栏目内容均从网络收集或者网友提供,供仅参考试用,我们无法保证内容完整和正确。如果资料损害了您的权益,请与站长联系,我们将及时删除并致以歉意。
    (单词翻译:双击或拖选)

 If you need a new liver, doctors have about twelve hours to transport it from a donor1. That ticking clock severely2 limits the ability of doctors to get organs to patients.

 
Now researchers have demonstrated a method that kept rat livers viable3 up to four days.
 
The scientists lowered the livers to below freezing temperatures, while flooding the tissue with antifreeze chemicals to prevent the formation of damaging ice crystals.
 
But such cooling alone is not sufficient, due in part to the liver’s wide variety of cell types and functions. So the researchers also used machine perfusion: as the livers were cooled they were flushed with solutions that kept them operational. They were perfused again as they were brought back to above-freezing temps.
 
All the rats that were implanted with 3-day-old livers survived for three months. Nearly 60 percent of the rats with four-day-old livers survived. In contrast, no rats that received 3- and 4-day-old livers preserved by currently used methods survived. 
 
This work is an early step toward creating a system that could work in humans, which would dramatically improve the chances of getting organs to people who desperately4 need them.
 

点击收听单词发音收听单词发音  

1 donor dstxI     
n.捐献者;赠送人;(组织、器官等的)供体
参考例句:
  • In these cases,the recipient usually takes care of the donor afterwards.在这类情况下,接受捐献者以后通常会照顾捐赠者。
  • The Doctor transplanted the donor's heart to Mike's chest cavity.医生将捐赠者的心脏移植进麦克的胸腔。
2 severely SiCzmk     
adv.严格地;严厉地;非常恶劣地
参考例句:
  • He was severely criticized and removed from his post.他受到了严厉的批评并且被撤了职。
  • He is severely put down for his careless work.他因工作上的粗心大意而受到了严厉的批评。
3 viable mi2wZ     
adj.可行的,切实可行的,能活下去的
参考例句:
  • The scheme is economically viable.这个计划从经济效益来看是可行的。
  • The economy of the country is not viable.这个国家经济是难以维持的。
4 desperately cu7znp     
adv.极度渴望地,绝望地,孤注一掷地
参考例句:
  • He was desperately seeking a way to see her again.他正拼命想办法再见她一面。
  • He longed desperately to be back at home.他非常渴望回家。
本文本内容来源于互联网抓取和网友提交,仅供参考,部分栏目没有内容,如果您有更合适的内容,欢迎点击提交分享给大家。
------分隔线----------------------------
TAG标签:   科学美国人60秒  SSS  英语听力
顶一下
(0)
0%
踩一下
(0)
0%
最新评论 查看所有评论
发表评论 查看所有评论
请自觉遵守互联网相关的政策法规,严禁发布色情、暴力、反动的言论。
评价:
表情:
验证码:
听力搜索
推荐频道
论坛新贴