SSS 2008-09-24

This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute. Theres a Native American site in Ohio that appeared to be a fort. But recent discoveries by archaeologists at the University of Cincinnati show thats n

SSS 2009-11-26

Roughly 1,000 years ago, Europe enjoyed several centuries of balmier average temperatures. Dubbed the Medieval Warm Period, it was the last time before the present that agriculture could flourish in Greenland. This era also provided fodder for countl

英文书摘精选 How The Mississippi Changes Its Course密西西比河如何改道?

Did you ever hear the saying, its easier to get the Mississippi to change its course than get a stubborn child to change his mind? I guess whoever made this one up didnt know that the Mississippi actually does change its course about every thousand y

托福听力短文 II-09-1

(MA) Look at our topographical map and you'll see that the middle third of the North American continent --- from the Rocky Mountains almost to the Mississippi River --- is pretty flat. This is the Great Plains. This kind of area is sometimes called

‘One-in-a-Billion’ Dinosaur Discovery

About 110 million years ago, a large plant-eating dinosaur covered with sharp points walked the land. Called a nodosaur, it is now the best example of its kind ever found. This new species of dinosaur is being called a one-in-a-billion discovery. Rec

VOA标准英语2011--Laos, Neighbors Face Off on Mekong River

Laos, Neighbors Face Off on Mekong River Dam Dispute Countries along the Mekong River have disagreed with Laos on its proposal to build the first hydropower dam on the main stream of the lower river. Laos says the dam will cause no serious problems,

VOA标准英语2012--Did Early Man Contribute to Central Africa Climate Change?

Did Early Man Contribute to Central Africa Climate Change? If humans are responsible for speeding the climate change currently underway, it may not be the first time. Scientists say a long time ago in Central Africa, early farmers may have contribute

VOA标准英语2012--Lake Sediment Could Better Date Ancient Finds

Lake Sediment Could Better Date Ancient Finds Radiocarbon dating is the best-known and most widely used method to determine the age of organic material, such as bone or wood or plant matter. All such material contains radioactive carbon atoms, known

VOA标准英语2012--US Army Corps of Engineers Works to Avert Crisis on Mississippi River

US Army Corps of Engineers Works to Avert Crisis on Mississippi River It is a familiar routine for the crew members of the Dredge Potter, making their way along the Mississippi River to the growing number of shallow trouble spots and digging in. The

美国国家公共电台 NPR Louisiana Wants To Use The Muddy Mississippi To Build Up Its Coast

RACHEL MARTIN, HOST: The state of Louisiana is sinking. It's already lost thousands of square miles because of rising seas. The state's marshland is disappearing as a result. Now, there is an ambitious plan to divert parts of the sediment-rich Missis

VOA双语新闻：4、早期人类造成中非雨林的消失？

If humans are responsible for speeding the climate change currently underway, it may not be the first time. Scientists say a long time ago in Central Africa, early farmers may have contributed to the disappearance of rainforests. The question is bein

雅思分类词汇：环境资源相关(五)

淡水FRESHWATER 淡水资源Freshwaterresources 谈水保护Conservationoffreshwater 水坝Dams 冰Ice 湖泊Lakes 自然排水系统Naturaldrainagesystems 河流流域开发Riverbasindevelopment 河流

澳科学家警告海平面上升问题

CANBERRA, Oct. 14 (Xinhua) -- Australian scientists have made the alarming discovery that sea levels have risen more in the past century than at any other comparable period in the past 6,000 years. Researchers from the Australian National University

目标6分--你的阅读应该做点啥

首先，我建议同学们不要上完辅导班就去参加考试。虽有趁热打铁之说，但是我相信绝大部分同学在上课期间已经把大部分的精力用于听讲和记笔记了，回家之后基本上就直奔安乐窝了。能够

VOA双语新闻：老挝与邻国在湄公河水坝争议中互不相让

Countries along the Mekong River have disagreed with Laos on its proposal to build the first hydropower dam on the main stream of the lower river. Laos says the dam will cause no serious problems, while its neighbors say more information is needed ab

再别康桥英文版

Saying Good-bye to Cambridge Again --by Xu Zhimo 再别康桥 徐志摩 Very quietly I take my leave As quietly as I came here; Quietly I wave good-bye To the rosy clouds in the western sky. The golden willows by the riverside Are young brides in the

托福阅读备考之长难句分析

世界本没有长难句，修饰成分多了，便有了长难句。 阅读速度大部分来于短时间内理解长难句的能力。 大家在看长难句的时候，多思考，一个句子为什么这么长，常见的修饰成分到底有哪些？

2018年CRI Scientists use massive river model to fight erosion

US Scientists working on new ways to battle the erosion that threatens Louisiana's coastline have a dramatic new tool: a massive replica of the lower Mississippi River. The multi-million US dollar model, complete with flowing water, aims to isolate t

以雅思阅读6分为目标的复习建议分享

近来在所接触到的考生当中，绝大部分都是准备到海外读语言、预科或是对雅思分数要求不高的准大学留学生。在他们身上都有着一个共同的特点，那就是时间比较紧迫且对雅思分数要求并不

英语听力文摘 English Digest 284、下沉的河流三角洲

Sinking River Deltas 据《生活科学》网站报道，美国科学家最新的研究报告显示，由于人类活动的影响，世界上大部分的河流三角洲正在不断下沉，使得该地区更易遭受到洪水和海洋风暴的袭击，