标签：sediment 相关文章
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
初学者听力文摘精选
今天我们要学的词是 erosion。 Erosion 的意思是侵蚀、腐蚀。A new high-speed rail station linking Hong Kong and mainland China opened under Beijing authority, raising new worries among Hong Kong residents of a further erosion of the
英语单词荟萃
Plants Put the Bend in Rivers Studies in the journals Geology and Earth-Science Reviews reveal that ancient rivers were broad straight sheets of water. Colonization by plants changed the water flow. Adam Hinterthuer reports What was around the bend i
60秒科学
198. The seismologist and the sect地震学家和教派 sect-sensible There was a professor of seismology who was involved in seismic research. After securing permission from his senator, he went to a particular sector of his state to collect sedimen
胡敏托福词汇记单词
考试日期 2013年3月2日 总体评析 一新：Section 2 三旧：Section 134 Section 1 版本号 场景 题型 待定 Hotel Reservation Completion 一句话简介 预订海滨酒店 详细回忆 1-10填空题： 1. address: 61/71, KVIUA 2. March
雅思机经
Greenhouse Gas Speeded Ice Age Melting A new study in the Journal Nature provides compelling evidence that carbon dioxide was a major driver of climate change at the end of the last Ice Age. That correlation supports the prevailing scientific view th
VOA标准英语2012年(四月)
Researchers in the Philippines will soon use mobile phones to help farmers use just the right amount of fertilizer, maximizing their harvests, saving them money and protecting the environment. It's a novel way to deliver important information to remo
VOA标准英语2010年(七)月
A discovery of a mummified forest that's between two and 10 million years old is giving scientists a new window on climate change. Joel Barker, a research scientist at the Byrd Polar Research Center at the Ohio State University, discovered the mummif
VOA标准英语2010年(十二)月
Warmer Oceans Could Mean Smaller Fish Warmer oceans William DAndrea studies how Earths climate changes over time. In an article just published in the journal Geology, the associate professor at Columbia Universitys Lamont-Doherty Earth Observatory ch
VOA标准英语2012年(十月)
In Africa, New Technologies Help Teach Women to Read 在非洲，新技术帮助教女人阅读 More Africans are communicating via text, social media and email. In Senegal, literacy experts are using the new technologies to motivate and teach women
VOA标准英语2014年(十月)
SharkFinder Brings Science Excitement to Classrooms 把科学带进教室 Science is advanced by professional researchers and scientists. Yet, many believe that average citizens - including school children - can make contributions to scientific advan
VOA标准英语2014年(八月)
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
2018年NPR美国国家公共电台5月
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
VOA双语新闻 2012年2月
Which Came First: The Proboscis or the Flower? To learn about the plant life of long ago, scientists dig through layers of the Earth, looking for fossil clues. Like bits of fossilized pollen, or spores.And that's where I come in. Timo van Eldijk (EL-
2018年科学美国人1月
Ancient Human DNA Found in Cave DirtDNA新途径 Fossilized skulls and skeletons found in European caves gave us our first glimpse of our ancient cousins, the Neandertals. And a finger bone, found in a Siberian cave, first indicated the existence of
2017年科学美国人(五)月
But there are now less than 2,000 living here, and they are becoming rarer all the time.-Before European settlers arrived, much of the coast here was covered in forest. And a lot of that was jungle just like this. This is a vibrant ecosystem in its o
自然百科2014年
The site was once a spring-fed pond, full of water. Mammoths were tempted in to drink. But when they tried to climb back out, the banks were steep and slippery. Just like the short-faced bear imprisoned underground, some became trapped. Scavengers wo
探索与发现2012年
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. 轻轻的我走了， 正如我轻轻的来； 我轻轻的招手， 作别西天的云彩。 The golden willows by the riverside A
双语有声阅读
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
2018CRI中国国际广播电台