段落1
This is Scientific American 60-Second Science. I'm Cynthia Graber. This'll just take a minute.
点击显示原文
- 收藏为 长难句
- 收藏为 语音问题
- 收藏为 好句
- 收藏为 其它
- 取消
It was the largest of the five major mass extinctions in Earth's history, well before the dinosaur-killer 66 million years ago.
点击显示原文
- 收藏为 长难句
- 收藏为 语音问题
- 收藏为 好句
- 收藏为 其它
- 取消
What's called the End Permian extinction, 252 million years ago, wiped out 96 percent of aquatic species and 70 percent of species on land.
点击显示原文
- 收藏为 长难句
- 收藏为 语音问题
- 收藏为 好句
- 收藏为 其它
- 取消
Scientists have been trying to gauge the time frame of the extinction, in the hopes of determining its causes.
点击显示原文
- 收藏为 长难句
- 收藏为 语音问题
- 收藏为 好句
- 收藏为 其它
- 取消
Now researchers say it's the fastest mass extinction known.
点击显示原文
- 收藏为 长难句
- 收藏为 语音问题
- 收藏为 好句
- 收藏为 其它
- 取消
Using new tools and models, including a fresh analysis of rock formations in China, the researchers determined that the extinction took only about 60,000 years.
点击显示原文
- 收藏为 长难句
- 收藏为 语音问题
- 收藏为 好句
- 收藏为 其它
- 取消
That's incredibly quick by geological standards, and is more than 10 times faster than previous estimates.
点击显示原文
- 收藏为 长难句
- 收藏为 语音问题
- 收藏为 好句
- 收藏为 其它
- 取消
The report is in the Proceedings of the National Academy of Sciences.
点击显示原文
- 收藏为 长难句
- 收藏为 语音问题
- 收藏为 好句
- 收藏为 其它
- 取消
Study author Samuel Bowring from MIT says they can't yet compare the speed of the previous extinction to the extinction rates caused by human activities today.
点击显示原文
- 收藏为 长难句
- 收藏为 语音问题
- 收藏为 好句
- 收藏为 其它
- 取消
But, he says, their research is starting to help reveal how past environmental changes that influenced extinctions,
点击显示原文
- 收藏为 长难句
- 收藏为 语音问题
- 收藏为 好句
- 收藏为 其它
- 取消
such as levels of carbon dioxide in the atmosphere, compare to the changes in those levels seen today.
点击显示原文
- 收藏为 长难句
- 收藏为 语音问题
- 收藏为 好句
- 收藏为 其它
- 取消
In the midst of what many call the sixth extinction.
点击显示原文
- 收藏为 长难句
- 收藏为 语音问题
- 收藏为 好句
- 收藏为 其它
- 取消
Thanks for the minute, for Scientific American 60-Second Science. I'm Cynthia Graber.
点击显示原文
- 收藏为 长难句
- 收藏为 语音问题
- 收藏为 好句
- 收藏为 其它
- 取消
-
1 / 13
- 收藏为 长难句
- 收藏为 语音问题
- 收藏为 好句
- 收藏为 其它
- 取消
显示原文 =This is Scientific American 60-Second Science. I'm Cynthia Graber. This'll just take a minute.
点击显示原文 = -
2 / 13
- 收藏为 长难句
- 收藏为 语音问题
- 收藏为 好句
- 收藏为 其它
- 取消
显示原文 =It was the largest of the five major mass extinctions in Earth's history, well before the dinosaur-killer 66 million years ago.
点击显示原文 = -
3 / 13
- 收藏为 长难句
- 收藏为 语音问题
- 收藏为 好句
- 收藏为 其它
- 取消
显示原文 =What's called the End Permian extinction, 252 million years ago, wiped out 96 percent of aquatic species and 70 percent of species on land.
点击显示原文 = -
4 / 13
- 收藏为 长难句
- 收藏为 语音问题
- 收藏为 好句
- 收藏为 其它
- 取消
显示原文 =Scientists have been trying to gauge the time frame of the extinction, in the hopes of determining its causes.
点击显示原文 = -
5 / 13
- 收藏为 长难句
- 收藏为 语音问题
- 收藏为 好句
- 收藏为 其它
- 取消
显示原文 =Now researchers say it's the fastest mass extinction known.
点击显示原文 = -
6 / 13
- 收藏为 长难句
- 收藏为 语音问题
- 收藏为 好句
- 收藏为 其它
- 取消
显示原文 =Using new tools and models, including a fresh analysis of rock formations in China, the researchers determined that the extinction took only about 60,000 years.
点击显示原文 = -
7 / 13
- 收藏为 长难句
- 收藏为 语音问题
- 收藏为 好句
- 收藏为 其它
- 取消
显示原文 =That's incredibly quick by geological standards, and is more than 10 times faster than previous estimates.
点击显示原文 = -
8 / 13
- 收藏为 长难句
- 收藏为 语音问题
- 收藏为 好句
- 收藏为 其它
- 取消
显示原文 =The report is in the Proceedings of the National Academy of Sciences.
点击显示原文 = -
9 / 13
- 收藏为 长难句
- 收藏为 语音问题
- 收藏为 好句
- 收藏为 其它
- 取消
显示原文 =Study author Samuel Bowring from MIT says they can't yet compare the speed of the previous extinction to the extinction rates caused by human activities today.
点击显示原文 = -
10 / 13
- 收藏为 长难句
- 收藏为 语音问题
- 收藏为 好句
- 收藏为 其它
- 取消
显示原文 =But, he says, their research is starting to help reveal how past environmental changes that influenced extinctions,
点击显示原文 = -
11 / 13
- 收藏为 长难句
- 收藏为 语音问题
- 收藏为 好句
- 收藏为 其它
- 取消
显示原文 =such as levels of carbon dioxide in the atmosphere, compare to the changes in those levels seen today.
点击显示原文 = -
12 / 13
- 收藏为 长难句
- 收藏为 语音问题
- 收藏为 好句
- 收藏为 其它
- 取消
显示原文 =In the midst of what many call the sixth extinction.
点击显示原文 = -
13 / 13
- 收藏为 长难句
- 收藏为 语音问题
- 收藏为 好句
- 收藏为 其它
- 取消
显示原文 =Thanks for the minute, for Scientific American 60-Second Science. I'm Cynthia Graber.
点击显示原文 =
- 单句循环：关
- 单句循环：×3
- 单句循环：×5
- 单句循环：∞