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 Christopher Intagliata. Got a minute?

点击显示原文

隐藏原文=

When you think endangered species, which come to mind? Tigers? Pandas?Gorillas?

点击显示原文

隐藏原文=

I'm guessing what probably does not are Hawaiian land snails.

点击显示原文

隐藏原文=

Yet a new analysis in the journal Conservation Biology suggests that some 95 percent of known Hawaiian land snails could already be gone.

点击显示原文

隐藏原文=

"So that's a horrible level of extinction."

点击显示原文

隐藏原文=

Robert Cowie, a biologist at the University of Hawaii.

点击显示原文

隐藏原文=

Cowie and his colleagues came up with the 95 percent figure by convening the world's foremost experts on Hawaiian land snails,

点击显示原文

隐藏原文=

that is, the dozen or so scientists and naturalists who study the creatures.

点击显示原文

隐藏原文=

Through a series of interviews and hundreds of field surveys of the islands, they took their best guess as to whether each of the 325 documented species still existed.

点击显示原文

隐藏原文=

They think only 15 are still alive, leaving 310 in the "probably extinct" category.

点击显示原文

隐藏原文=

There is an organization that officially counts this stuff: the International Union for Conservation of Nature.

点击显示原文

隐藏原文=

But the Union lists only 33 of the 325 species as extinct, a gross underestimate, in Cowie's view.

点击显示原文

隐藏原文=

And therein lies the problem, he says.

点击显示原文

隐藏原文=

Invertebrates, including snails, make up the lion's share of the world's biodiversity.

点击显示原文

隐藏原文=

But there's hardly anyone to catalogue it.

点击显示原文

隐藏原文=

"It's a tiny, tiny number of people relative to the vast extent of invertebrate biodiversity."

点击显示原文

隐藏原文=

And to get an organism onto official endangered lists, you need data to document its disappearance.

点击显示原文

隐藏原文=

Data that just aren't there for many invertebrates, due to the labor shortage.

点击显示原文

隐藏原文=

"In my more cynical, negative days I throw up my hands and say, why do we even bother?

点击显示原文

隐藏原文=

Because we're not going to be able to halt this, to turn around this process.

点击显示原文

隐藏原文=

But if you care about this you just can't give up."

点击显示原文

隐藏原文=

And this approach, he says, an almost folkloric reconstruction of what's out there, may be the only way to fully understand the species we're losing.

点击显示原文

隐藏原文=

Before they're known only from fossils.

点击显示原文

隐藏原文=

Thanks for the minute, for Scientific American 60-Second Science.I'm Christopher Intagliata.

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
  • 第 15 句
  • 第 16 句
  • 第 17 句
  • 第 18 句
  • 第 19 句
  • 第 20 句
  • 第 21 句
  • 第 22 句
  • 第 23 句
  • 第 24 句

+ 创建收藏夹
保存 取消