反馈建议 切换旧版 去做题 结束训练
全文精听 逐句精听
句间停顿： 关
  • 关
  • 1S
  • 3S
  • 5S
语速： x 1.0
  • 速度0.8X
  • 速度1.0X
  • 速度1.2X
  • 速度1.5X
  • 速度1.8X
  • 速度2X
始终显示原文
欢迎使用 KMF 精听精研
坚持练习精听，反复听、吃透每个句子，能够快速 提升听力能力
开始精听
或按 「 空格」开始播放

段落1

This is Scientific American 60-Second Science. I'm Cynthia Graber. Got a minute?

点击显示原文

隐藏原文=

If you need a new liver, doctors have about twelve hours to transport it from a donor.

点击显示原文

隐藏原文=

That ticking clock severely limits the ability of doctors to get organs to patients.

点击显示原文

隐藏原文=

Now researchers have demonstrated a method that kept rat livers viable up to four days.

点击显示原文

隐藏原文=

The scientists lowered the livers to below freezing temperatures, while flooding the tissue with antifreeze chemicals to prevent the formation of damaging ice crystals.

点击显示原文

隐藏原文=

But such cooling alone is not sufficient, due in part to the liver's wide variety of cell types and functions.

点击显示原文

隐藏原文=

So the researchers also used machine perfusion: as the livers were cooled they were flushed with solutions that kept them operational.

点击显示原文

隐藏原文=

They were perfused again as they were brought back to above-freezing temps.

点击显示原文

隐藏原文=

All the rats that were implanted with 3-day-old livers survived for three months.

点击显示原文

隐藏原文=

Nearly 60 percent of the rats with four-day-old livers survived.

点击显示原文

隐藏原文=

In contrast, no rats that received 3- and 4-day-old livers preserved by currently used methods survived.

点击显示原文

隐藏原文=

This work is an early step toward creating a system that could work in humans,

点击显示原文

隐藏原文=

which would dramatically improve the chances of getting organs to people who desperately need them.

点击显示原文

隐藏原文=

Thanks for the minute, for Scientific American 60-Second Science. I'm Cynthia Graber.

点击显示原文

隐藏原文=
[ < 空格 > ]
当前句 /
/
  • 段落1
  • 第 1 句
  • 第 2 句
  • 第 3 句
  • 第 4 句
  • 第 5 句
  • 第 6 句
  • 第 7 句
  • 第 8 句
  • 第 9 句
  • 第 10 句
  • 第 11 句
  • 第 12 句
  • 第 13 句
  • 第 14 句

+ 创建收藏夹
保存 取消