手机APP下载

您现在的位置: 首页 > 在线广播 > VOA慢速英语 > VOA慢速-科学报道 > 正文

VOA慢速英语(翻译+字幕+讲解):浮游生物对地球和人类的意义

来源:可可英语 编辑:Sunny   可可英语APP下载 |  可可官方微信:ikekenet
 下载MP3到电脑  批量下载MP3和LRC到手机
加载中..
d;B+zKJPh;&6#c

%1L,3ZJe.K

For years, most people thought of small organisms called plankton as food for whales and other large sea animals. But a four-year long study discovered that plankton are a major supplier of oxygen on our planet.

sV)@%ZF8@_NHDWG-Ml).

Plankton are a group of different ocean creatures, algae, bacteria and other organisms. They live close to the water's surface in oceans, seas and lakes. Plankton cannot be seen without a microscope. But they are the main source of food for larger animals, like whales.

,8+lo%scdgBoh#S|P~

Recently, 200 scientists from 45 countries took turns researching plankton on a two-mast schooner. The boat set sail in September 2009. It visited 210 areas. The scientists collected 35,000 samples of plankton. The researchers followed the lives of plankton, examined their genetic material and watched their movements.

QJhWi^MxPfR0VT3lYk|

A French non-profit group called Tara Expeditions launched the project, known as Tara Oceans. Chris Bowler was the project's scientific coordinator. He says the researchers found that plankton are very important to the health of our planet.

qoi+&t~PpJ2A7*P

"Generating the oxygen we breathe, removing carbon dioxide from the atmosphere and generally maintaining this Earth in a state that is habitable for us human beings."

*,u1D0=2CZOF

Mr. Bowler says almost half of the oxygen we breathe comes from very small algae called diatoms. These plants live in the part of the water where the sun reaches.

lp)3S8kHNP

"That basically means every fifth time that you breathe, you're breathing oxygen -- which we can directly trace back to diatoms, so they're sort of as important as a tropical rain forest in terms of their global contribution."

nCO]=J@BaaxuC

Romain Troublé is the executive director of Tara Oceans. He believes the study shows that the ocean greatly affects the earth's climate.

;nyl#3gENKE#y)

"We believe that the ocean is also a main driver of the climate change, a main, main mitigator in the way that the ocean and the life in the ocean is storing carbon dioxide, storing heat. And this machinery works because the ocean is in good health."

e=miP9+Ajk3Zxw

Different groups of researchers studied different things. One group identified more than 40 million plankton genes formerly unknown to scientists.

mhKM*PU#Q_jM)J|Y)

The collected information will be used to identify which of the plankton have little or no trouble reacting to changing water conditions.

+luIbXjklBq

Results of the study appeared in the online scientific journal Science. The publication says many experts will be examining the study.

dR3woP=DIliin

I'm Christopher Jones-Cruise.

g1QqYeu|[2

+JfY4#BC#534sVWrrOXHjTp8%#!aiDblgpj7*HAYB

重点单词   查看全部解释    
microscope ['maikrəskəup]

想一想再看

n. 显微镜

联想记忆
machinery [mə'ʃi:nəri]

想一想再看

n. (总称)机器,机械

 
unknown ['ʌn'nəun]

想一想再看

adj. 未知的,不出名的

 
band [bænd]

想一想再看

n. 带,箍,波段
n. 队,一群,乐队

 
source [sɔ:s]

想一想再看

n. 发源地,来源,原始资料

 
trace [treis]

想一想再看

n. 痕迹,踪迹,微量
vt. 追踪,找出根源

 
bacteria [bæk'tiəriə]

想一想再看

n. (复数)细菌

 
tropical ['trɔpikəl]

想一想再看

adj. 热带的,炎热的,热带植物的

 
identified

想一想再看

adj. 被识别的;经鉴定的;被认同者 v. 鉴定(id

 
supplier [sə'plaiə]

想一想再看

n. 供应者,供应厂商,供应国

 

发布评论我来说2句

    最新文章

    可可英语官方微信(微信号:ikekenet)

    每天向大家推送短小精悍的英语学习资料.

    添加方式1.扫描上方可可官方微信二维码。
    添加方式2.搜索微信号ikekenet添加即可。