只用一本书提高英语听力能力!重温经典名著双语阅读小编推荐:跟着纪录片学英语不背单词和语法,轻松学英语
返回列表 回复 发帖

[科学美国人60秒] 【整理】SSS 2008-07-02

提高英语听力能力 找对方法很重要!

homework

This is Scientific American’s 60 seconds’ science. I’m Karen Hopkin.

 

This will just take a minute.

 

Nothing is the green house gas that traps heat even better than carbon dioxide. It comes from a variety of sources, including the fusel fuel production, and even farming. Cows give off methane you know, after they eat.

 

Even the surface water of the ocean contains substantial amounts of this gas, but where marine methane comes from was a mystery until now. Scientists collected sea water off the coast of Hawaii, and they found the bacteria that living in these waters scarf up certain phosphorous-containing chemicals and they release methane as byproduct. The results appear on line in the journal Nature Geo-science.

 

What’s surprising is that the scientists previously thought that methane is only produced by bacteria living in places where there is no oxygen. They get this many associated with the swamp or with the mud at the bottom of a murky pond.

 

This marine methane could be contributed to global warming by adding more greenhouse gases to the atmosphere. What’s worse, the hotter it is, the more stress the sea f bacteria get and the more methane they are likely to put out, which is certainly not the feedback the atmosphere scientists were hoping to get.

 

Thanks for the minute,for Scientific American's 60-Second-Science.I'm Karen Hopkin.

 

scarf up 吃掉 scoff 的变体 美俚 phosphorous 磷

 

 

Connasi-toi toi-meme

http://hanqialice.spaces.live.com/
返回列表