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

This is Scientific American 60-Second Earth. I'm David Biello. Your minute begins now.

点击显示原文

隐藏原文=

Flaming cauldrons of molten metal have long been the primary venues for steel production.

点击显示原文

隐藏原文=

But blast furnaces require a lot of coal, which means greenhouse gas pollution.

点击显示原文

隐藏原文=

In fact, worldwide, steelmaking is responsible for 5 percent of annual emissions.

点击显示原文

隐藏原文=

But scientists working on a way to harvest oxygen from the iron oxide in lunar soil for future moon bases realized that they happened on a better way to make steel here on Earth.

点击显示原文

隐藏原文=

The trick?

点击显示原文

隐藏原文=

Produce steel the way we make aluminum: use electricity rather than flame.

点击显示原文

隐藏原文=

To make steel the old-fashioned way, you blast iron ore with heat and purify the resulting molten metal with oxygen.

点击显示原文

隐藏原文=

The process removes carbon from the steel, but produces carbon dioxide.

点击显示原文

隐藏原文=

Making a ton of steel releases roughly two tons of CO2,

点击显示原文

隐藏原文=

and the world uses a lot of steel in cars, buildings and other infrastructure.

点击显示原文

隐藏原文=

The new method involves passing a current through a molten pool of iron oxide, which drives off the originally sought-after oxygen.

点击显示原文

隐藏原文=

The by-product is steel.

点击显示原文

隐藏原文=

And depending on the source of the electricity, the process could be nearly CO2-free.

点击显示原文

隐藏原文=

Which, as far as the atmosphere is concerned, would be very cool.

点击显示原文

隐藏原文=

Your minute is up, for Scientific American 60-Second Earth. I'm David Biello,

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

+ 创建收藏夹
保存 取消