句间停顿:
  • 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

NARRATOR

Now listen to part of a lecture on this topic in a biology class.

点击显示原文

隐藏原文=

段落2

MALE PROFESSOR

Imagine there's a group of mice living in a large field, and owls living nearby.

点击显示原文

隐藏原文=

Now, owls eat mice¡ªso the number of mice there are at any given time depends upon the number of owls in the area...

点击显示原文

隐藏原文=

um, because the more owls there are, the more mice get eaten, right?

点击显示原文

隐藏原文=

Now, imagine one year,

点击显示原文

隐藏原文=

there are more owls than usual.

点击显示原文

隐藏原文=

Since there are more owls in the area to eat the mice,

点击显示原文

隐藏原文=

what do you think will happen to the number of mice?

点击显示原文

隐藏原文=

As you can imagine,

点击显示原文

隐藏原文=

the number would drop... there'd be fewer mice.

点击显示原文

隐藏原文=

段落3

As far as the other factor...

点击显示原文

隐藏原文=

um, we can use rabbits to help understand this one.

点击显示原文

隐藏原文=

Imagine a population of rabbits living in an area...

点击显示原文

隐藏原文=

These rabbits usually start having their young at the end of winter,

点击显示原文

隐藏原文=

after the cold winter weather is gone,

点击显示原文

隐藏原文=

and they keep reproducing until the following winter, when they will stop again while the cold winter weather lasts.

点击显示原文

隐藏原文=

But let's say this year, the winter season is very short...

点击显示原文

隐藏原文=

and it uh, you know, starts getting warm much earlier than usual.

点击显示原文

隐藏原文=

Since winter this year is so short,

点击显示原文

隐藏原文=

the rabbits can start reproducing much earlier.

点击显示原文

隐藏原文=

That means the rabbits in that area will have at least one extra reproductive cycle,

点击显示原文

隐藏原文=

so, of course, one extra litter of baby rabbits.

点击显示原文

隐藏原文=

So the number of rabbits in that area would increase a lot.

点击显示原文

隐藏原文=
[ < 空格 > ]
当前句 /
/
  • 段落1
  • 第 1 句
  • 段落2
  • 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
  • 段落3
  • 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

+ 创建收藏夹
保存 取消